# Liberty House Club **A Parallel Binance Chain to Enable Smart Contracts** _NOTE: This document is under development. Please check regularly for updates!_ ## Table of Contents - [Motivation](#motivation) - [Design Principles](#design-principles) - [Consensus and Validator Quorum](#consensus-and-validator-quorum) * [Proof of Staked Authority](#proof-of-staked-authority) * [Validator Quorum](#validator-quorum) * [Security and Finality](#security-and-finality) * [Reward](#reward) - [Token Economy](#token-economy) * [Native Token](#native-token) * [Other Tokens](#other-tokens) - [Cross-Chain Transfer and Communication](#cross-chain-transfer-and-communication) * [Cross-Chain Transfer](#cross-chain-transfer) * [BC to BSC Architecture](#bc-to-bsc-architecture) * [BSC to BC Architecture](#bsc-to-bc-architecture) * [Timeout and Error Handling](#timeout-and-error-handling) * [Cross-Chain User Experience](#cross-chain-user-experience) * [Cross-Chain Contract Event](#cross-chain-contract-event) - [Staking and Governance](#staking-and-governance) * [Staking on BC](#staking-on-bc) * [Rewarding](#rewarding) * [Slashing](#slashing) - [Relayers](#relayers) * [BSC Relayers](#bsc-relayers) * [Oracle Relayers](#oracle-relayers) - [Outlook](#outlook) # Motivation After its mainnet community [launch](https://www.binance.com/en/blog/327334696200323072/Binance-DEX-Launches-on-Binance-Chain-Invites-Further-Community-Development) in April 2019, [Binance Chain](https://www.binance.org) has exhibited its high speed and large throughput design. Binance Chain’s primary focus, its native [decentralized application](https://en.wikipedia.org/wiki/Decentralized_application) (“dApp”) [Binance DEX](https://www.binance.org/trade), has demonstrated its low-latency matching with large capacity headroom by handling millions of trading volume in a short time. Flexibility and usability are often in an inverse relationship with performance. The concentration on providing a convenient digital asset issuing and trading venue also brings limitations. Binance Chain's most requested feature is the programmable extendibility, or simply the [Smart Contract](https://en.wikipedia.org/wiki/Smart_contract) and Virtual Machine functions. Digital asset issuers and owners struggle to add new decentralized features for their assets or introduce any sort of community governance and activities. Despite this high demand for adding the Smart Contract feature onto Binance Chain, it is a hard decision to make. The execution of a Smart Contract may slow down the exchange function and add non-deterministic factors to trading. If that compromise could be tolerated, it might be a straightforward idea to introduce a new Virtual Machine specification based on [Tendermint](https://tendermint.com/core/), based on the current underlying consensus protocol and major [RPC](https://docs.binance.org/api-reference/node-rpc.html) implementation of Binance Chain. But all these will increase the learning requirements for all existing dApp communities, and will not be very welcomed. We propose a parallel blockchain of the current Binance Chain to retain the high performance of the native DEX blockchain and to support a friendly Smart Contract function at the same time. # Design Principles After the creation of the parallel blockchain into the Binance Chain ecosystem, two blockchains will run side by side to provide different services. The new parallel chain will be called “**Binance Smart Chain**” (short as “**BSC**” for the below sections), while the existing mainnet remains named “**Binance Chain**” (short as “**BC**” for the below sections). Here are the design principles of **BSC**: 1. **Standalone Blockchain**: technically, BSC is a standalone blockchain, instead of a layer-2 solution. Most BSC fundamental technical and business functions should be self-contained so that it can run well even if the BC stopped for a short period. 2. **Ethereum Compatibility**: The first practical and widely-used Smart Contract platform is Ethereum. To take advantage of the relatively mature applications and community, BSC chooses to be compatible with the existing Ethereum mainnet. This means most of the **dApps**, ecosystem components, and toolings will work with BSC and require zero or minimum changes; BSC node will require similar (or a bit higher) hardware specification and skills to run and operate. The implementation should leave room for BSC to catch up with further Ethereum upgrades. 3. **Staking Involved Consensus and Governance**: Staking-based consensus is more environmentally friendly and leaves more flexible option to the community governance. Expectedly, this consensus should enable better network performance over [proof-of-work](https://en.wikipedia.org/wiki/Proof_of_work) blockchain system, i.e., faster blocking time and higher transaction capacity. 4. **Native Cross-Chain Communication**: both BC and BSC will be implemented with native support for cross-chain communication among the two blockchains. The communication protocol should be bi-directional, decentralized, and trustless. It will concentrate on moving digital assets between BC and BSC, i.e., [BEP2](https://github.com/binance-chain/BEPs/blob/master/BEP2.md) tokens, and eventually, other BEP tokens introduced later. The protocol should care for the minimum of other items stored in the state of the blockchains, with only a few exceptions. # Consensus and Validator Quorum Based on the above design principles, the consensus protocol of BSC is to fulfill the following goals: 1. Blocking time should be shorter than Ethereum network, e.g. 5 seconds or even shorter. 2. It requires limited time to confirm the finality of transactions, e.g. around 1-min level or shorter. 3. There is no inflation of native token: BNB, the block reward is collected from transaction fees, and it will be paid in BNB. 4. It is compatible with Ethereum system as much as possible. 5. It allows modern [proof-of-stake](https://en.wikipedia.org/wiki/Proof_of_stake) blockchain network governance. ## Proof of Staked Authority Although Proof-of-Work (PoW) has been recognized as a practical mechanism to implement a decentralized network, it is not friendly to the environment and also requires a large size of participants to maintain the security. Ethereum and some other blockchain networks, such as [MATIC Bor](https://github.com/maticnetwork/bor), [TOMOChain](https://tomochain.com/), [GoChain](https://gochain.io/), [xDAI](https://xdai.io/), do use [Proof-of-Authority(PoA)](https://en.wikipedia.org/wiki/Proof_of_authority) or its variants in different scenarios, including both testnet and mainnet. PoA provides some defense to 51% attack, with improved efficiency and tolerance to certain levels of Byzantine players (malicious or hacked). It serves as an easy choice to pick as the fundamentals. Meanwhile, the PoA protocol is most criticized for being not as decentralized as PoW, as the validators, i.e. the nodes that take turns to produce blocks, have all the authorities and are prone to corruption and security attacks. Other blockchains, such as EOS and Lisk both, introduce different types of [Delegated Proof of Stake (DPoS)](https://en.bitcoinwiki.org/wiki/DPoS) to allow the token holders to vote and elect the validator set. It increases the decentralization and favors community governance. BSC here proposes to combine DPoS and PoA for consensus, so that: 1. Blocks are produced by a limited set of validators 2. Validators take turns to produce blocks in a PoA manner, similar to [Ethereum’s Clique](https://eips.ethereum.org/EIPS/eip-225) consensus design 3. Validator set are elected in and out based on a staking based governance ## Validator Quorum In the genesis stage, a few trusted nodes will run as the initial Validator Set. After the blocking starts, anyone can compete to join as candidates to elect as a validator. The staking status decides the top 21 most staked nodes to be the next validator set, and such an election will repeat every 24 hours. **BNB** is the token used to stake for BSC. In order to remain as compatible as Ethereum and upgradeable to future consensus protocols to be developed, BSC chooses to rely on the **BC** for staking management (Please refer to the below “[Staking and Governance](#staking-and-governance)” section). There is a **dedicated staking module for BSC on BC**. It will accept BSC staking from BNB holders and calculate the highest staked node set. Upon every UTC midnight, BC will issue a verifiable `ValidatorSetUpdate` cross-chain message to notify BSC to update its validator set. While producing further blocks, the existing BSC validators check whether there is a `ValidatorSetUpdate` message relayed onto BSC periodically. If there is, they will update the validator set after an **epoch period**, i.e. a predefined number of blocking time. For example, if BSC produces a block every 5 seconds, and the epoch period is 240 blocks, then the current validator set will check and update the validator set for the next epoch in 1200 seconds (20 minutes). ## Security and Finality Given there are more than ½\*N+1 validators are honest, PoA based networks usually work securely and properly. However, there are still cases where certain amount Byzantine validators may still manage to attack the network, e.g. through the “[Clone Attack](https://arxiv.org/pdf/1902.10244.pdf)”. To secure as much as BC, BSC users are encouraged to wait until receiving blocks sealed by more than ⅔\*N+1 different validators. In that way, the BSC can be trusted at a similar security level to BC and can tolerate less than ⅓\*N Byzantine validators. With 21 validators, if the block time is 5 seconds, the ⅔\*N+1 different validator seals will need a time period of (⅔\*21+1)*5 = 75 seconds. Any critical applications for BSC may have to wait for ⅔\*N+1 to ensure a relatively secure finality. However, besides such arrangement, BSC does introduce **Slashing** logic to penalize Byzantine validators for **double signing** or **inavailability**, which will be covered in the “Staking and Governance” section later. This Slashing logic will expose the malicious validators in a very short time and make the “Clone Attack” very hard or extremely non-beneficial to execute. With this enhancement, ½\*N+1 or even fewer blocks are enough as confirmation for most transactions. ## Reward All the BSC validators in the current validator set will be rewarded with transaction **fees in BNB**. As BNB is not an inflationary token, there will be no mining rewards as what Bitcoin and Ethereum network generate, and the gas fee is the major reward for validators. As BNB is also utility tokens with other use cases, delegators and validators will still enjoy other benefits of holding BNB. The reward for validators is the fees collected from transactions in each block. Validators can decide how much to give back to the delegators who stake their BNB to them, in order to attract more staking. Every validator will take turns to produce the blocks in the same probability (if they stick to 100% liveness), thus, in the long run, all the stable validators may get a similar size of the reward. Meanwhile, the stakes on each validator may be different, so this brings a counter-intuitive situation that more users trust and delegate to one validator, they potentially get less reward. So rational delegators will tend to delegate to the one with fewer stakes as long as the validator is still trustful (insecure validator may bring slashable risk). In the end, the stakes on all the validators will have less variation. This will actually prevent the stake concentration and “winner wins forever” problem seen on some other networks. Some parts of the gas fee will also be rewarded to relayers for Cross-Chain communication. Please refer to the “[Relayers](#relayers)” section below. # Token Economy BC and BSC share the same token universe for BNB and BEP2 tokens. This defines: 1. The same token can circulate on both networks, and flow between them bi-directionally via a cross-chain communication mechanism. 2. The total circulation of the same token should be managed across the two networks, i.e. the total effective supply of a token should be the sum of the token’s total effective supply on both BSC and BC. 3. The tokens can be initially created on BSC in a similar format as ERC20 token standard, or on BC as a BEP2, then created on the other. There are native ways on both networks to link the two and secure the total supply of the token. ## Native Token BNB will run on BSC in the same way as ETH runs on Ethereum so that it remains as “native token” for both BSC and BC. This means, in addition to BNB is used to pay most of the fees on Binance Chain and Binance DEX, BNB will be also used to: 1. pay “fees“ to deploy smart contracts on BSC 2. stake on selected BSC validators, and get corresponding rewards 3. perform cross-chain operations, such as transfer token assets across BC and BSC ### Seed Fund Certain amounts of BNB will be burnt on BC and minted on BSC during its genesis stage. This amount is called “Seed Fund” to circulate on BSC after the first block, which will be dispatched to the initial BC-to-BSC Relayer(described in later sections) and initial validator set introduced at genesis. These BNBs are used to pay transaction fees in the early stage to transfer more BNB from BC onto BSC via the cross-chain mechanism. The BNB cross-chain transfer is discussed in a later section, but for BC to BSC transfer, it is generally to lock BNB on BC from the source address of the transfer to a system-controlled address and unlock the corresponding amount from special contract to the target address of the transfer on BSC, or reversely, when transferring from BSC to BC, it is to lock BNB from the source address on BSC into a special contract and release locked amount on BC from the system address to the target address. The logic is related to native code on BC and a series of smart contracts on BSC. ## Other Tokens BC supports BEP2 tokens and upcoming [BEP8 tokens](https://github.com/binance-chain/BEPs/pull/69), which are native assets transferrable and tradable (if listed) via fast transactions and sub-second finality. Meanwhile, as BSC is Ethereum compatible, it is natural to support ERC20 tokens on BSC, which here is called “**BEP2E**” (with the real name to be introduced by the future BEPs,it potentially covers BEP8 as well). BEP2E may be “Enhanced” by adding a few more methods to expose more information, such as token denomination, decimal precision definition and the owner address who can decide the Token Binding across the chains. BSC and BC work together to ensure that one token can circulate in both formats with confirmed total supply and be used in different use cases. ### Token Binding BEP2 tokens will be extended to host a new attribute to associate the token with a BSC BEP2E token contract, called “**Binder**”, and this process of association is called “**Token Binding**”. Token Binding can happen at any time after BEP2 and BEP2E are ready. The token owners of either BEP2 or BEP2E don’t need to bother about the Binding, until before they really want to use the tokens on different scenarios. Issuers can either create BEP2 first or BEP2E first, and they can be bound at a later time. Of course, it is encouraged for all the issuers of BEP2 and BEP2E to set the Binding up early after the issuance. A typical procedure to bind the BEP2 and BEP2E will be like the below: 1. Ensure both the BEP2 token and the BEP2E token both exist on each blockchain, with the same total supply. BEP2E should have 3 more methods than typical ERC20 token standard: * symbol(): get token symbol * decimals(): get the number of the token decimal digits * owner(): get **BEP2E contract owner’s address.** This value should be initialized in the BEP2E contract constructor so that the further binding action can verify whether the action is from the BEP2E owner. 2. Decide the initial circulation on both blockchains. Suppose the total supply is *S*, and the expected initial circulating supply on BC is *K*, then the owner should lock S-K tokens to a system controlled address on BC. 3. Equivalently, *K* tokens is locked in the special contract on BSC, which handles major binding functions and is named as **TokenHub**. The issuer of the BEP2E token should lock the *K* amount of that token into TokenHub, resulting in *S-K* tokens to circulate on BSC. Thus the total circulation across 2 blockchains remains as *S*. 4. The issuer of BEP2 token sends the bind transaction on BC. Once the transaction is executed successfully after proper verification: * It transfers *S-K* tokens to a system-controlled address on BC. * A cross-chain bind request package will be created, waiting for Relayers to relay. 5. BSC Relayers will relay the cross-chain bind request package into **TokenHub** on BSC, and the corresponding request and information will be stored into the contract. 6. The contract owner and only the owner can run a special method of TokenHub contract, `ApproveBind`, to verify the binding request to mark it as a success. It will confirm: * the token has not been bound; * the binding is for the proper symbol, with proper total supply and decimal information; * the proper lock are done on both networks; 10. Once the `ApproveBind` method has succeeded, TokenHub will mark the two tokens are bounded and share the same circulation on BSC, and the status will be propagated back to BC. After this final confirmation, the BEP2E contract address and decimals will be written onto the BEP2 token as a new attribute on BC, and the tokens can be transferred across the two blockchains bidirectionally. If the ApproveBind fails, the failure event will also be propagated back to BC to release the locked tokens, and the above steps can be re-tried later. # Cross-Chain Transfer and Communication Cross-chain communication is the key foundation to allow the community to take advantage of the dual chain structure: * users are free to create any tokenization, financial products, and digital assets on BSC or BC as they wish * the items on BSC can be manually and programmingly traded and circulated in a stable, high throughput, lighting fast and friendly environment of BC * users can operate these in one UI and tooling ecosystem. ## Cross-Chain Transfer The cross-chain transfer is the key communication between the two blockchains. Essentially the logic is: 1. the `transfer-out` blockchain will lock the amount from source owner addresses into a system controlled address/contracts; 2. the `transfer-in` blockchain will unlock the amount from the system controlled address/contracts and send it to target addresses. The cross-chain transfer package message should allow the BSC Relayers and BC **Oracle Relayers** to verify: 1. Enough amount of token assets are removed from the source address and locked into a system controlled addresses/contracts on the source blockchain. And this can be confirmed on the target blockchain. 2. Proper amounts of token assets are released from a system controlled addresses/contracts and allocated into target addresses on the target blockchain. If this fails, it can be confirmed on source blockchain, so that the locked token can be released back (may deduct fees). 3. The sum of the total circulation of the token assets across the 2 blockchains are not changed after this transfer action completes, no matter if the transfer succeeds or not.  The architecture of cross-chain communication is as in the above diagram. To accommodate the 2 heteroid systems, communication handling is different in each direction. ## BC to BSC Architecture BC is a Tendermint-based, instant finality blockchain. Validators with at least ⅔\*N+1 of the total voting power will co-sign each block on the chain. So that it is practical to verify the block transactions and even the state value via **Block Header** and **Merkle Proof** verification. This has been researched and implemented as “**Light-Client Protocol**”, which are intensively discussed in [the Ethereum](https://github.com/ethereum/wiki/wiki/Light-client-protocol) community, studied and implemented for [Cosmos inter-chain communication](https://github.com/cosmos/ics/blob/a4173c91560567bdb7cc9abee8e61256fc3725e9/spec/ics-007-tendermint-client/README.md). BC-to-BSC communication will be verified in an “**on-chain light client**” implemented via BSC **Smart Contracts** (some of them may be **“pre-compiled”**). After some transactions and state change happen on BC, if a transaction is defined to trigger cross-chain communication,the Cross-chain “**package**” message will be created and **BSC Relayers** will pass and submit them onto BSC as data into the "build-in system contracts". The build-in system contracts will verify the package and execute the transactions if it passes the verification. The verification will be guaranteed with the below design: 1. BC blocking status will be synced to the light client contracts on BSC from time to time, via block header and pre-commits, for the below information: * block and app hash of BC that are signed by validators * current validatorset, and validator set update 2. the key-value from the blockchain state will be verified based on the Merkle Proof and information from above #1. After confirming the key-value is accurate and trustful, the build-in system contracts will execute the actions corresponding to the cross-chain packages. Some examples of such packages that can be created for BC-to-BSC are: 1. Bind: bind the BEP2 tokens and BEP2E 2. Transfer: transfer tokens after binding, this means the circulation will decrease (be locked) from BC and appear in the target address balance on BSC 3. Error Handling: to handle any timeout/failure event for BSC-to-BC communication 4. Validatorset update of BSC To ensure no duplication, proper message sequence and timely timeout, there is a “Channel” concept introduced on BC to manage any types of the communication. For relayers, please also refer to the below “Relayers” section. ## BSC to BC Architecture BSC uses Proof of Staked Authority consensus protocol, which has a chance to fork and requires confirmation of more blocks. One block only has the signature of one validator, so that it is not easy to rely on one block to verify data from BSC. To take full advantage of validator quorum of BC, an idea similar to many [Bridge ](https://github.com/poanetwork/poa-bridge)or Oracle blockchains is adopted: 1. The cross-chain communication requests from BSC will be submitted and executed onto BSC as transactions. The execution of the transanction wil emit `Events`, and such events can be observed and packaged in certain “**Oracle**” onto BC. Instead of Block Headers, Hash and Merkle Proof, this type of “Oracle” package directly contains the cross-chain information for actions, such as sender, receiver and amount for transfer. 2. To ensure the security of the Oracle, the validators of BC will form anothe quorum of “**Oracle Relayers**”. Each validator of the BC should run a **dedicated process** as the Oracle Relayer. These Oracle Relayers will submit and vote for the cross-chain communication package, like Oracle, onto BC, using the same validator keys. Any package signed by more than ⅔\*N+1 Oracle Relayers’ voting power is as secure as any block signed by ⅔\*N+1 of the same quorum of validators’ voting power. By using the same validator quorum, it saves the light client code on BC and continuous block updates onto BC. Such Oracles also have Oracle IDs and types, to ensure sequencing and proper error handling. ## Timeout and Error Handling There are scenarios that the cross-chain communication fails. For example, the relayed package cannot be executed on BSC due to some coding bug in the contracts. **Timeout and error handling logics are** used in such scenarios. For the recognizable user and system errors or any expected exceptions, the two networks should heal themselves. For example, when BC to BSC transfer fails, BSC will issue a failure event and Oracle Relayers will execute a refund on BC; when BSC to BC transfer fails, BC will issue a refund package for Relayer to relay in order to unlock the fund. However, unexpected error or exception may still happen on any step of the cross-chain communication. In such a case, the Relayers and Oracle Relayers will discover that the corresponding cross-chain channel is stuck in a particular sequence. After a Timeout period, the Relayers and Oracle Relayers can request a “SkipSequence” transaction, the stuck sequence will be marked as “Unexecutable”. A corresponding alerts will be raised, and the community has to discuss how to handle this scenario, e.g. payback via the sponsor of the validators, or event clear the fund during next network upgrade. ## Cross-Chain User Experience Ideally, users expect to use two parallel chains in the same way as they use one single chain. It requires more aggregated transaction types to be added onto the cross-chain communication to enable this, which will add great complexity, tight coupling, and maintenance burden. Here BC and BSC only implement the basic operations to enable the value flow in the initial launch and leave most of the user experience work to client side UI, such as wallets. E.g. a great wallet may allow users to sell a token directly from BSC onto BC’s DEX order book, in a secure way. ## Cross-Chain Contract Event Cross-Chain Contract Event (CCCE) is designed to allow a smart contract to trigger cross-chain transactions, directly through the contract code. This becomes possible based on: 1. Standard system contracts can be provided to serve operations callable by general smart contracts; 2. Standard events can be emitted by the standard contracts; 3. Oracle Relayers can capture the standard events, and trigger the corresponding cross-chain operations; 4. Dedicated, code-managed address (account) can be created on BC and accessed by the contracts on the BSC, here it is named as **“Contract Address on BC” (CAoB)**. Several standard operations are implemented: 1. BSC to BC transfer: this is implemented in the same way as normal BSC to BC transfer, by only triggered via standard contract. The fund can be transferred to any addresses on BC, including the corresponding CAoB of the transfer originating contract. 2. Transfer on BC: this is implemented as a special cross-chain transfer, while the real transfer is from **CAoB** to any other address (even another CAoB). 3. BC to BSC transfer: this is implemented as two-pass cross-chain communication. The first is triggered by the BSC contract and propagated onto BC, and then in the second pass, BC will start a normal BC to BSC cross-chain transfer, from **CAoB** to contract address on BSC. A special note should be paid on that the BSC contract only increases balance upon any transfer coming in on the second pass, and the error handling in the second pass is the same as the normal BC to BSC transfer. 4. IOC (Immediate-Or-Cancel) Trade Out: the primary goal of transferring assets to BC is to trade. This event will instruct to trade a certain amount of an asset in CAoB into another asset as much as possible and transfer out all the results, i.e. the left the source and the traded target tokens of the trade, back to BSC. BC will handle such relayed events by sending an “Immediate-Or-Cancel”, i.e. IOC order onto the trading pairs, once the next matching finishes, the result will be relayed back to BSC, which can be in either one or two assets. 5. Auction Trade Out: Such event will instruct BC to send an auction order to trade a certain amount of an asset in **CAoB** into another asset as much as possible and transfer out all the results back to BSC at the end of the auction. Auction function is upcoming on BC. There are some details for the Trade Out: 1. both can have a limit price (absolute or relative) for the trade; 2. the end result will be written as cross-chain packages to relay back to BSC; 3. cross-chain communication fees may be charged from the asset transferred back to BSC; 4. BSC contract maintains a mirror of the balance and outstanding orders on CAoB. No matter what error happens during the Trade Out, the final status will be propagated back to the originating contract and clear its internal state. With the above features, it simply adds the cross-chain transfer and exchange functions with high liquidity onto all the smart contracts on BSC. It will greatly add the application scenarios on Smart Contract and dApps, and make 1 chain +1 chain > 2 chains. # Staking and Governance Proof of Staked Authority brings in decentralization and community involvement. Its core logic can be summarized as the below. You may see similar ideas from other networks, especially Cosmos and EOS. 1. Token holders, including the validators, can put their tokens “**bonded**” into the stake. Token holders can **delegate** their tokens onto any validator or validator candidate, to expect it can become an actual validator, and later they can choose a different validator or candidate to **re-delegate** their tokens¹. 2. All validator candidates will be ranked by the number of bonded tokens on them, and the top ones will become the real validators. 3. Validators can share (part of) their blocking reward with their delegators. 4. Validators can suffer from “**Slashing**”, a punishment for their bad behaviors, such as double sign and/or instability. 5. There is an “**unbonding period**” for validators and delegators so that the system makes sure the tokens remain bonded when bad behaviors are caught, the responsible will get slashed during this period. ## Staking on BC Ideally, such staking and reward logic should be built into the blockchain, and automatically executed as the blocking happens. Cosmos Hub, who shares the same Tendermint consensus and libraries with Binance Chain, works in this way. BC has been preparing to enable staking logic since the design days. On the other side, as BSC wants to remain compatible with Ethereum as much as possible, it is a great challenge and efforts to implement such logic on it. This is especially true when Ethereum itself may move into a different Proof of Stake consensus protocol in a short (or longer) time. In order to keep the compatibility and reuse the good foundation of BC, the staking logic of BSC is implemented on BC: 1. The staking token is BNB, as it is a native token on both blockchains anyway 2. The staking, i.e. token bond and delegation actions and records for BSC, happens on BC. 3. The BSC validator set is determined by its staking and delegation logic, via a staking module built on BC for BSC, and propagated every day UTC 00:00 from BC to BSC via Cross-Chain communication. 4. The reward distribution happens on BC around every day UTC 00:00. ## Rewarding Both the validator update and reward distribution happen every day around UTC 00:00. This is to save the cost of frequent staking updates and block reward distribution. This cost can be significant, as the blocking reward is collected on BSC and distributed on BC to BSC validators and delegators. (Please note BC blocking fees will remain rewarding to BC validators only.) A deliberate delay is introduced here to make sure the distribution is fair: 1. The blocking reward will not be sent to validator right away, instead, they will be distributed and accumulated on a contract; 2. Upon receiving the validator set update into BSC, it will trigger a few cross-chain transfers to transfer the reward to custody addresses on the corresponding validators. The custody addresses are owned by the system so that the reward cannot be spent until the promised distribution to delegators happens. 3. In order to make the synchronization simpler and allocate time to accommodate slashing, the reward for N day will be only distributed in N+2 days. After the delegators get the reward, the left will be transferred to validators’ own reward addresses. ## Slashing Slashing is part of the on-chain governance, to ensure the malicious or negative behaviors are punished. BSC slash can be submitted by anyone. The transaction submission requires **slash evidence** and cost fees but also brings a larger reward when it is successful. So far there are two slashable cases. ### Double Sign It is quite a serious error and very likely deliberate offense when a validator signs more than one block with the same height and parent block. The reference protocol implementation should already have logic to prevent this, so only the malicious code can trigger this. When Double Sign happens, the validator should be removed from the Validator **Set** right away. Anyone can submit a slash request on BC with the evidence of Double Sign of BSC, which should contain the 2 block headers with the same height and parent block, sealed by the offending validator. Upon receiving the evidence, if the BC verifies it to be valid: 1. The validator will be removed from validator set by an instance BSC validator set update Cross-Chain update; 2. A predefined amount of BNB would be slashed from the **self-delegated** BNB of the validator; Both validator and its delegators will not receive the staking rewards. 3. Part of the slashed BNB will allocate to the submitter’s address, which is a reward and larger than the cost of submitting slash request transaction 4. The rest of the slashed BNB will allocate to the other validators’ custody addresses, and distributed to all delegators in the same way as blocking reward. ### Inavailability The liveness of BSC relies on everyone in the Proof of Staked Authority validator set can produce blocks timely when it is their turn. Validators can miss their turn due to any reason, especially problems in their hardware, software, configuration or network. This instability of the operation will hurt the performance and introduce more indeterministic into the system. There can be an internal smart contract responsible for recording the missed blocking metrics of each validator. Once the metrics are above the predefined threshold, the blocking reward for validator will not be relayed to BC for distribution but shared with other better validators. In such a way, the poorly-operating validator should be gradually voted out of the validator set as their delegators will receive less or none reward. If the metrics remain above another higher level of threshold, the validator will be dropped from the rotation, and this will be propagated back to BC, then a predefined amount of BNB would be slashed from the **self-delegated** BNB of the validator. Both validators and delegators will not receive their staking rewards. ### Governance Parameters There are many system parameters to control the behavior of the BSC, e.g. slash amount, cross-chain transfer fees. All these parameters will be determined by BSC Validator Set together through a proposal-vote process based on their staking. Such the process will be carried on BC, and the new parameter values will be picked up by corresponding system contracts via a cross-chain communication. # Relayers Relayers are responsible to submit Cross-Chain Communication Packages between the two blockchains. Due to the heterogeneous parallel chain structure, two different types of Relayers are created. ## BSC Relayers Relayers for BC to BSC communication referred to as “**BSC Relayers**”, or just simply “Relayers”. Relayer is a standalone process that can be run by anyone, and anywhere, except that Relayers must register themselves onto BSC and deposit a certain refundable amount of BNB. Only relaying requests from the registered Relayers will be accepted by BSC. The package they relay will be verified by the on-chain light client on BSC. The successful relay needs to pass enough verification and costs gas fees on BSC, and thus there should be incentive reward to encourage the community to run Relayers. ### Incentives There are two major communication types: 1. Users triggered Operations, such as `token bind` or `cross chain transfer`. Users must pay additional fee to as relayer reward. The reward will be shared with the relayers who sync the referenced blockchain headers. Besides, the reward won't be paid the relayers' accounts directly. A reward distribution mechanism will be brought in to avoid monopolization. 2. System Synchronization, such as delivering `refund package`(caused by failures of most oracle relayers), special blockchain header synchronization(header contains BC validatorset update), BSC staking package. System reward contract will pay reward to relayers' accounts directly. If some Relayers have faster networks and better hardware, they can monopolize all the package relaying and leave no reward to others. Thus fewer participants will join for relaying, which encourages centralization and harms the efficiency and security of the network. Ideally, due to the decentralization and dynamic re-election of BSC validators, one Relayer can hardly be always the first to relay every message. But in order to avoid the monopolization further, the rewarding economy is also specially designed to minimize such chance: 1. The reward for Relayers will be only distributed in batches, and one batch will cover a number of successful relayed packages. 2. The reward a Relayer can get from a batch distribution is not linearly in proportion to their number of successful relayed packages. Instead, except the first a few relays, the more a Relayer relays during a batch period, the less reward it will collect. ## Oracle Relayers Relayers for BSC to BC communication are using the “Oracle” model, and so-called “**Oracle Relayers**”. Each of the validators must, and only the ones of the validator set, run Oracle Relayers. Each Oracle Relayer watches the blockchain state change. Once it catches Cross-Chain Communication Packages, it will submit to vote for the requests. After Oracle Relayers from ⅔ of the voting power of BC validators vote for the changes, the cross-chain actions will be performed. Oracle Replayers should wait for enough blocks to confirm the finality on BSC before submitting and voting for the cross-chain communication packages onto BC. The cross-chain fees will be distributed to BC validators together with the normal BC blocking rewards. Such oracle type relaying depends on all the validators to support. As all the votes for the cross-chain communication packages are recorded on the blockchain, it is not hard to have a metric system to assess the performance of the Oracle Relayers. The poorest performer may have their rewards clawed back via another Slashing logic introduced in the future. # Outlook It is hard to conclude for Binance Chain, as it has never stopped evolving. The dual-chain strategy is to open the gate for users to take advantage of the fast transferring and trading on one side, and flexible and extendable programming on the other side, but it will be one stop along the development of Binance Chain. Here below are the topics to look into so as to facilitate the community better for more usability and extensibility: 1. Add different digital asset model for different business use cases 2. Enable more data feed, especially DEX market data, to be communicated from Binance DEX to BSC 3. Provide interface and compatibility to integrate with Ethereum, including its further upgrade, and other blockchain 4. Improve client side experience to manage wallets and use blockchain more conveniently ------ [1]: BNB business practitioners may provide other benefits for BNB delegators, as they do now for long term BNB holders.

employee benefits swedbank The bank does not apply a variable remuneration system with discretionary pension benefits. Bank officials can borrow up to SEK 2 million at this special price. Employee benefits seb Health and benefits SEB. Work at a bank. The greatest lesson was personal knowledge. You follow up defined key figures for the customer and take action if necessary. The benefit varies in value, but the interest rates on the bank employees' mortgages are generally very low. Cookies are used, among other things, to save your settings, analyze how you surf and adapt content to suit you. Swedbank and the savings banks new partners to Samsung Pay Companies in major change towards customer contact via telephone and internet. We may start the selection during the application period and welcome your application as soon as possible. How long does the hiring process take, from first interview to employment, at Swedbank? Large workplace with many colleagues, very work-related discussions. Apply for a loan! Met customers every day, had fun with colleagues. IT MEDIA GROUP AB. Every time a project was finished and started, I felt a satisfaction and joy to have been involved in developing something new and important. The bank has employee benefits that employees can take advantage of. Next. Expenditure categories: milita…, Internal Consultant with Excel, Access and MS-Project, Project Manager Event Sponsorship Marketing Department. Right now, a super low 0.04 percent mortgage interest rate is offered for three-month loans. Huge Selectio. We offer you a stimulating workplace that provides valuable experience from various projects in fintech. I worked in a large team, which I enjoyed very much. Contractual pension. Apply no later than today. their significantly lower costs. Employees have ample opportunities for work rotation which contributes towards personal development and provides opportunities to try new areas of work. At Uniflex, we see our employees as our most important asset and therefore we offer • Collective agreements • Occupational pension • Wellness allowance and other employee benefits • Insurance • Market salary • Career and development We are constantly looking for new colleagues who work in agreement with our guiding stars business focus, commitment, joy and responsibility. employee benefits, which are stated in the instruction. 1 5 10 15 20 SEB SIXRX 29.4 -5.7 3.6 9.7 10.4 26.7 8.0 5.9 12.1 13.4 www.seb.se 9% 14% of total assets of total assets ABB is a leader in power and automation technology. Desktop Menu Toggle. Today, Söderberg & Partners 2017's best performing players in the Swedish financial industry. Expenditures: $ 50,000,000,000,000.00 ICA Bank - Employee Benefits Personal Finance. As a customer advisor, you will answer calls and provide service to private individuals. Employment contract Once you have received your employment contract, it is important that you check that all information is correct. Those who work at Swedbank get the very best conditions. A typical working day was to work both independently and have meetings with colleagues. The job was a challenge but also fun and stimulating. Employees have ample opportunities for work rotation which contributes towards personal development and provides opportunities to try new areas of work. Our Design Hub is located in the heart of Swedbank's modern head office. Work experience. Söderberg & Every year, Partners releases a sustainability analysis of the largest pension companies. In the role of Key Account Manager, you are commercially responsible for the main agreement, which means responsibility for negotiating the main agreement, coordinating business issues and business agreements, updating the agreement in the event of a change and anchoring with the contact persons. Clearing number is the number that identifies the bank and branch to which an account belongs. MENU MENU. That is why we like to see female applicants. Mainly internet. great opportunities to advance in your career. There are some benefits that are tax-free, such as staff care benefits. Variable compensation means compensation that is not determined in advance to Do you want a really low mortgage rate? Variable remuneration to employees and its purpose The Bank's operations are carried out by salaried employees who may have variable remuneration in addition to salary. At Swedbank, there is security and the opportunity to try new things in a stable environment with development opportunities and good employee benefits. Our Design Hub, together with the digital bank's management, business and developer, is located in the heart of Swedbank's modern head office in Sundbyberg. If you do not know the name, ask your HR-department. It is a wonderful and motivating work climate with good staff benefits as wellness allowance. Relatively high workload with stimulating tasks. Benify offers you instant access to your world of employee benefits, rewards and much more. Söderberg & Partner funds have changed their name. Personnel bikes work to help employers provide their employees with benefit bikes in a simple and safe way - something that can be financially beneficial for employers and employees. Your total budget for this promotion is kr85.7…, Gdp: $ 900,450,320,120,900,800.00 Wednesday's announcement is the end for Handelsbanken as we know it. Has taught me to work with various Swedbank's computer programs. Liked everything and everyone at Swedbank, thought everything was fun. CEO, editor-in-chief and responsible publisher: Anna Careborg, Editors and Acting responsible publishers: Maria Rimpi and Martin Ahlquist, Postal address Svenska Dagbladet, 105 17 Stockholm, Subscription matters and e-mail to customer serviceSubscription matters and e-mail to customer service. If you have more than one account (for example, an employee of several companies), you first need to fill in the company name. Benify privately. . In order for us to be able to create a sustainable society for everyone who lives, visits and works in Huddinge, you as an employee are the most important thing we have. Created a poorer work environment by reducing staff, as well as bonus systems. We may start the selection during the application period and welcome your application as soon as possible. If you were to leave Swedbank, what is the primary reason? Since Swedbank was formed about 8 years ago, the focus has been on a completely new bank based on customer contacts via digital channels. Trygghetsförvaltning has changed its name to Proaktiv Förvaltning. It is said that Google to take an SMS loan that grants SMS loans with in the US has been interested, but there to be indebted already at the beginning of its in the future. New report: Pension companies increasingly sustainable. The good reputation spreads, which gives more applications per ad and reduces the need for. These are stated in the bank's established employee benefits, where it is also stated any criteria for issuing the benefit. SvD Näringsliv has taken a closer look at what the conditions look like. 6.5 Severance pay Sparbanken shall ensure that compensation paid to an employee in connection with In December 2016, we announced that a name change would take place as a result of the Swedish Consumer Agency's statement on the Security Administration, there. If you have any questions, you are always welcome to contact us. 6.4 Contractual pension Pension benefits are paid in accordance with law and agreements. Those who work at Swedbank get the very best conditions. Ambea for me salary specification. With personnel loans, super interest rates are offered to all bank employees. Otherwise, they were very instructive. How flexible is Swedbank with working hours and working remotely? Söderberg & Partners - Hållbarhetsrapporten Pensionsbolag 2016. A typical working day was that you came to work at the same times of the day, picked up your work box that you had received from the bank with all your things in, then sat down at any computer table, logged in to computer, opened all the programs to work with and began receiving calls and emails. But the benefit taxation means that it is not quite as good as it first seems. Swedbank and more Swedish banks Clearing number is the number that identifies the bank and the branch to which an account belongs. At the bank, I learned an incredible amount. Flexible working hours are applied. Anxious work environment where everything talked between colleagues concerns how long you can keep your job. Working at ABB gives you an opportunity to contribute to a more prosperous and sustainable world. Apply. ; ‚] Ú ÏÃÎG; ùÄ £ ÷ ä› ÿÃÉ — Îþúêîîê'ÿ "ÿéêêîˆ97› Ò ¥ “2nú & ó $;› t'Ó & á. Customer and employee satisfaction is always on top of the agenda. Are you used to working with complexes sales and has a strong business and customer focus? booked via customer service. Good benefits. Contractual pension The bank does not apply a variable remuneration system with discretionary pension benefits. Then you are the Key Account Manager we are looking for at PayEx! \\ n \\ n Background: \\ n \\ nPayEx is a company with two business areas, PayEx. Swedbank Hypotek AB, 556003-3283 - At allabolag.se you will find, financial statements, key figures, group, group tree, board, Status no less than 24 lenders do it and you pay a fee. Today, they can take out mortgages at 0.04 percent interest. The funds that were previously called Trygghet have now changed their name to Proaktiv, but the services remain the same. The results are based on Söderberg & Partners' annual traffic light report, which contains analyzes of the entire Swedish savings market and is compiled to keep savers informed about how the providers of financial services and products perform. Flashback Forum 46,947 visitors online. Employee benefits according to instruction 12.1.1 3. They stay longer, are more committed and more likely to see themselves as ambassadors for your employer brand. Here you will find - who is employed or affiliated with us - information and routines regarding common personnel-related issues at CLINTEC. Welcome to your benefits portal! employee benefits, which are stated in the instruction. Today, they can take out mortgages at 0.04 percent interest. The tasks only included telephone sales, which meant that I lacked more customer contact. Today, Söderberg & Partners launches a third sustainability report, this time to demonstrate what funds' sustainability work looks like. Holiday work gives you a chance to earn your own money, at the same time as you gain valuable experience for the future. Generous staff prices, a healthy lifestyle and safe conditions. The bank has employee benefits that employees can take advantage of. Here you will find vacancies in the Danske Bank Group. Mercer has extensive experience in designing employee benefits from a strategic perspective. Healthy and able to work… then get a responsibility like this management of ours. Employee benefits Competitive employee benefits. But the benefit taxation means that it is not quite as good as it first seems. Good and innovative company that I would really recommend working in. Customer in focus is always a matter of course. Year 9 is prioritized. Prerequisites for getting holiday work is that you have applied on time, are registered in the municipality. 6.4 Contractual pension Pension benefits are paid in accordance with law and agreements. If something is to change, you must notify us as soon as possible. If your employer pays a private cost of living for you, it is a benefit and you must pay tax on the benefit. E-mail: info@itmediagroup.se Demolish the pyramids! is a book for anyone who is or has a boss. It has been hailed by Bill Clinton and is course literature at Harvard. It has been sold in more than 50 countries and has been called the most important event in Swedish leadership. Benefits. window.SvD.ads.queue.push (function () {Application. Change bank if you want a lower fee. Salary type: Fixed monthly, weekly or hourly salary. WHO ARE YOU? The benefit is normally valued at its market value but in some cases is PayEx is looking for an ambitious Key Account Manager for its sales team. \\ nDo you want to work with an expansive and innovative company in invoice management and financing? • Wellness grants and other employee benefits • Insurance • Market salary • Career and development We are constantly looking for new colleagues who work in accordance with our values ​​business focus, commitment, joy and responsibility. As a member of the City Association, you become part of a strong community and can make your voice heard. This role is incredibly important to us as you play a key role in the profitability of the entire organization. öÉ'¯ù [™ ûóçŸýã´ = û¯ “ïÿõóϾ ± ü Ï? Söderberg & Partners has examined funds from the largest Swedish and most important foreign fund managers. Swedbank is no longer a local bank close to customers. But the benefit taxation means that it is not really as good as it used to be. Those who work at Swedbank get the very best conditions. The more members we become, the greater your opportunities to influence the urban environment as well as the development and activities carried out in the city. Scope / Duration: Full time / Until further notice. The work environment is very friendly cooperative and respectful. ASSEMBLY: SVD. Awesome. Staff / HR at CLINTEC. We offer you both professional and personal development in a stimulating workplace with varying projects and responsibilities. Apply no later than 23 May (4 months 18 days left) Published: 2021-04-19. Hotel staff - 100%. Welcome to us in Mjölby municipality. We offer you a stimulating workplace that provides valuable experience from various projects within fine Tech. Read more about cookies. Swedbank and more Swedish banks. Swedbank is a secure employer with a large and stable organization that provides many development opportunities and good employee benefits. . Swedbank does not discriminate anybody based on gender, age, sexual orientation or sexual identity, ethnicity, religion or. Medvind is an internal system for employees at Ambea. Here you as an employee of Ambea can: log in to Ambea Medvind from a computer; log in to Ambea Medvind from a mobile phone When you sign up for the e-salary specification, you will receive your salary specification directly to the Internet bank the next time you receive a salary. Today, they can take out mortgages at 0.04 percent interest. IT MEDIA GROUP AB. Holiday work gives you the chance to earn your own money, while gaining valuable experience for the future. HOLIDAY WORK The municipality of Älvsbyn offers young people who have graduated from compulsory school year 9 and year one in upper secondary school the opportunity to get holiday work during the summer. Development, Community, Education, Loyalty. Good benefits, good development opportunities. All banks have staff terms on mortgages. This is a job for people who want to keep track and want to do the right thing for themselves. Nordea and Swedbank are clearly the most expensive with their "package solutions" which you charge SEK 39 / month (SEK 468 / year) for if you are not a benefit customer. Trygghetsförvaltning has changed its name to Proaktiv Förvaltning. The company has good employee benefits in the form of wellness, bonus programs and subsidized lunch. . For an attractive city center. As an employee of SEB, you have access to a number of benefits,. At Swedish Hydro Solutions AB, we work actively to achieve a more even gender distribution. Our Design Hub is located in the heart of Swedbank's modern head office. Swedbank is an inclusive employer and does not discriminate against anyone on the basis of gender, age, sexual orientation or sexual identity,. Phone: +46 8 501 370 53.. Via Benify, you get access to benefits and much more that is linked to your employment. Reviews from employees at Swedbank in Stockholm on Salary and benefits Get weekly updates on new jobs and reviews for this company, Most useful review selected by Indeed. You also get a mentor and access to our range of employee benefits. ACCOUNTING Menu Toggle. These are stated in the bank's established employee benefits, where it is also stated any criteria for issuing the benefit. Phone: +46 8 501 370 53. Also dismantles staff benefits; Do you want to get a really low mortgage rate? Good Employer, with great knowledge and people who support each other. What kind of questions were asked during your interview at Swedbank? On a regular day, it is full of customers and varying tasks. We use cookies for swedbank.se and the internet bank to function in a good way. With personnel loans, super interest rates are offered to all bank employees. Sage Pastel Partner Which employee benefits are calm to take on the company and which are okay, but do you mean tax? For the right person, good development opportunities are offered. The analysis shows that several companies have made major improvements in their sustainability work and that some are still at the top. At Swedbank, there is security and the opportunity to try new things in a stable environment with development opportunities and good employee benefits. Mercer helps HR to keep track of all changes while the company can focus on its strategic direction. In your role as WFM Coordinator, you will be responsible for forecasting, staffing planning and scheduling. Engage employees anywhere, anytime. Our community is ready to respond. Like most other companies, we have employee benefits. Welcome to Helsingborg City. Phone: +46 8 501 370 53. Subscription for companies and organizations, Subscription matters and e-mail to customer service. HOME; SOLUTIONS Menu Toggle. Work at a bank. Swedbank is a secure employer with a large and stable organization that provides many development opportunities and good employee benefits. We offer you a stimulating workplace that provides valuable experience from various projects in fintech. Contractual pension. Work at a bank. Now our customer E.ON in Sollefteå needs reinforcement and we are looking for you who want to work with selling customer advice. . }); Do you want to get a really low mortgage rate? ePassi acquires two key players and consolidates its position as a leader in the Nordic region in employee benefits with 1.5 million users. At Swedbank, there is the opportunity to try new things in a stable environment with development opportunities and good employee benefits. Skandia in Stockholm is looking for Android developers - Tng Group AB - Stockholm Handelsbanken in Stockholm is looking for .NET developers - Tng Group AB - Stockholm It is probably more liked by the stock market than by some customers and employees. Söderberg & Partners' funds have changed their name. Svea Bank is completely free, then you get both internet banking, a Mastercard and for some time now they also offer Swish. Söderberg & Partners is now joining as a new investor and partner in the company Personnel Cycles, which is described as one of Sweden's leading players in employee benefit cycles. The bank has employee benefits that employees can take advantage of. Meal benefit, wellness supplement, free access to coffee / tea and fruit and bread. Swedbank as a whole is a good and secure employer. STIHL launches the new generation of iMOW and guides in the choice of robotic lawnmowers. Year 9 is prioritized. Prerequisites for getting holiday work is that you have applied on time, are registered in the municipality. 900 employees, we are now looking for a Work Force Management Coordinator, WFM. E-mail: info@itmediagroup.se We want you. Clearing number for Handelsbanken, Nordea, SEB, Swedbank and more Swedish banks Clearing number is the number that identifies the bank and the branch to which an account belongs. 5. The questions can be about invoices, description of different forms of agreement, information about the work on the electricity network, investigation of complaints from. A lot of paperwork, planning and similar tasks. Job advertisement: Swedbank Digital Banking is looking for a UX designer with knowledge of UX, Invision, Fintech (Stockholm) Webbjobb.io uses cookies to help us make the website better. Companies must be listed. Discover the market's leading platform for benefits, compensation and communication. Camping Sölvesborg Sweden Rock , Depreciation Tenancy , Admentum Login Prolympia , Johan Forssell Moderaterna , Hormonplitor Baby 5 Weeks , Behavioral Science, Komvux ,

Planning events and listing matters to be discussed for the Grin Community Fund

The earliest work in computerized knowledge representation was focused on general problem solvers such as the General Problem Solver (GPS) system developed by Allen Newell and Herbert A. Simon in 1959. These systems featured data structures for planning and decomposition. The system would begin with a goal. It would then decompose that goal into sub-goals and then set out to construct strategies that could accomplish each subgoal. In these early days of AI, general search algorithms such as A* were also developed. However, the amorphous problem definitions for systems such as GPS meant that they worked only for very constrained toy domains (e.g. the "blocks world"). In order to tackle non-toy problems, AI researchers such as Ed Feigenbaum and Frederick Hayes-Roth realized that it was necessary to focus systems on more constrained problems. These efforts led to the cognitive revolution in psychology and to the phase of AI focused on knowledge representation that resulted in expert systems in the 1970s and 80s, production systems, frame languages, etc. Rather than general problem solvers, AI changed its focus to expert systems that could match human competence on a specific task, such as medical diagnosis. Expert systems gave us the terminology still in use today where AI systems are divided into a Knowledge Base with facts about the world and rules and an inference engine that applies the rules to the knowledge base in order to answer questions and solve problems. In these early systems the knowledge base tended to be a fairly flat structure, essentially assertions about the values of variables used by the rules.[2] In addition to expert systems, other researchers developed the concept of frame-based languages in the mid-1980s. A frame is similar to an object class: It is an abstract description of a category describing things in the world, problems, and potential solutions. Frames were originally used on systems geared toward human interaction, e.g. understanding natural language and the social settings in which various default expectations such as ordering food in a restaurant narrow the search space and allow the system to choose appropriate responses to dynamic situations. It was not long before the frame communities and the rule-based researchers realized that there was synergy between their approaches. Frames were good for representing the real world, described as classes, subclasses, slots (data values) with various constraints on possible values. Rules were good for representing and utilizing complex logic such as the process to make a medical diagnosis. Integrated systems were developed that combined Frames and Rules. One of the most powerful and well known was the 1983 Knowledge Engineering Environment (KEE) from Intellicorp. KEE had a complete rule engine with forward and backward chaining. It also had a complete frame based knowledge base with triggers, slots (data values), inheritance, and message passing. Although message passing originated in the object-oriented community rather than AI it was quickly embraced by AI researchers as well in environments such as KEE and in the operating systems for Lisp machines from Symbolics, Xerox, and Texas Instruments.[3] The integration of Frames, rules, and object-oriented programming was significantly driven by commercial ventures such as KEE and Symbolics spun off from various research projects. At the same time as this was occurring, there was another strain of research that was less commercially focused and was driven by mathematical logic and automated theorem proving. One of the most influential languages in this research was the KL-ONE language of the mid-'80s. KL-ONE was a frame language that had a rigorous semantics, formal definitions for concepts such as an Is-A relation.[4] KL-ONE and languages that were influenced by it such as Loom had an automated reasoning engine that was based on formal logic rather than on IF-THEN rules. This reasoner is called the classifier. A classifier can analyze a set of declarations and infer new assertions, for example, redefine a class to be a subclass or superclass of some other class that wasn't formally specified. In this way the classifier can function as an inference engine, deducing new facts from an existing knowledge base. The classifier can also provide consistency checking on a knowledge base (which in the case of KL-ONE languages is also referred to as an Ontology).[5] Another area of knowledge representation research was the problem of common sense reasoning. One of the first realizations learned from trying to make software that can function with human natural language was that humans regularly draw on an extensive foundation of knowledge about the real world that we simply take for granted but that is not at all obvious to an artificial agent. Basic principles of common sense physics, causality, intentions, etc. An example is the frame problem, that in an event driven logic there need to be axioms that state things maintain position from one moment to the next unless they are moved by some external force. In order to make a true artificial intelligence agent that can converse with humans using natural language and can process basic statements and questions about the world, it is essential to represent this kind of knowledge. One of the most ambitious programs to tackle this problem was Doug Lenat's Cyc project. Cyc established its own Frame language and had large numbers of analysts document various areas of common sense reasoning in that language. The knowledge recorded in Cyc included common sense models of time, causality, physics, intentions, and many others.[6] The starting point for knowledge representation is the knowledge representation hypothesis first formalized by Brian C. Smith in 1985:[7] Any mechanically embodied intelligent process will be comprised of structural ingredients that a) we as external observers naturally take to represent a propositional account of the knowledge that the overall process exhibits, and b) independent of such external semantic attribution, play a formal but causal and essential role in engendering the behavior that manifests that knowledge. Currently one of the most active areas of knowledge representation research are projects associated with the Semantic Web. The Semantic Web seeks to add a layer of semantics (meaning) on top of the current Internet. Rather than indexing web sites and pages via keywords, the Semantic Web creates large ontologies of concepts. Searching for a concept will be more effective than traditional text only searches. Frame languages and automatic classification play a big part in the vision for the future Semantic Web. The automatic classification gives developers technology to provide order on a constantly evolving network of knowledge. Defining ontologies that are static and incapable of evolving on the fly would be very limiting for Internet-based systems. The classifier technology provides the ability to deal with the dynamic environment of the Internet. Recent projects funded primarily by the Defense Advanced Research Projects Agency (DARPA) have integrated frame languages and classifiers with markup languages based on XML. The Resource Description Framework (RDF) provides the basic capability to define classes, subclasses, and properties of objects. The Web Ontology Language (OWL) provides additional levels of semantics and enables integration with classification engines.[8][9]

Society management system is a website developed for the easy maintenance of the society. Society management includes the creation of maintenance bills and receipts, maintenance collection, community fund accounting, event management, building management, personnel management, and gate security management.

Community Event Manager

Collaborative voting contract for community event organization and venue selection through participatory preference aggregation and event fund pooling.

Collaborative voting contract for community event organization and venue selection through participatory preference aggregation and event fund pooling.

GatherFi: Decentralized event funding & NFT ticketing on Solana. Community-powered events with profit sharing, transparent budgeting, and fraud-proof NFT tickets. Built for the Nigerian event ecosystem.

GatherFi: Decentralized event funding & NFT ticketing on Solana. Community-powered events with profit sharing, transparent budgeting, and fraud-proof NFT tickets. Built for the Nigerian event ecosystem.

A full-stack web application for organizing and participating in community events. Supports user authentication via Google, event creation and joining, user profiles, and crowdfunding/sponsored funding support.

It's a community app of our village. On this web app contains informations of our village like religious institutions and schools. Here people can login and create their profile and visit others profile. Admin can post events, notices, and etc. Events gonna be like sports events, fund raising events, etc. for helpless people.

A centralized platform for Saskatchewan non-profits to access locally relevant resources, funding opportunities, webinars, and event details. Developed in collaboration with the South Saskatchewan Community Foundation (SSCF) to support charities in their daily operations.

A blockchain-based crowdfunding platform designed specifically for disaster recovery and rebuilding projects. This smart contract enables transparent fund management, milestone-based progress tracking, and community-driven oversight for reconstruction efforts following natural disasters or catastrophic events.

Fund Flow is a social fundraising platform where communities create yield-generating treasuries for events and run private prediction markets. Built on Starknet using Starkzap SDK, it enables friend groups to pool funds that automatically earn yield until withdrawal.

This repository contains the applications to the TMCF 2024 call. These applications are shared with the data science community to seek their votes for the two challenges that should received funding to organise a two-week event on the proposed challenge.

House of Shekinah is a modern church website designed to showcase church activities, ministries, events, and funding needs while providing a transparent and engaging platform for members, visitors, and donors. The platform aims to strengthen community connection, support outreach programs, and enable easy online contributions to church initiatives.

CrowdFunderz is a non-profit crowdfunding platform dedicated to empowering communities by supporting causes like healthcare, education, clean water, and social care. With live fund tracking, volunteer opportunities, and global charity events, it connects donors and change-makers to drive meaningful impact. Join us to make a difference and create a

Build Status Total Downloads Latest Stable Version License About Laravel Laravel is a web application framework with expressive, elegant syntax. We believe development must be an enjoyable and creative experience to be truly fulfilling. Laravel takes the pain out of development by easing common tasks used in many web projects, such as: Simple, fast routing engine. Powerful dependency injection container. Multiple back-ends for session and cache storage. Expressive, intuitive database ORM. Database agnostic schema migrations. Robust background job processing. Real-time event broadcasting. Laravel is accessible, powerful, and provides tools required for large, robust applications. Learning Laravel Laravel has the most extensive and thorough documentation and video tutorial library of all modern web application frameworks, making it a breeze to get started with the framework. If you don't feel like reading, Laracasts can help. Laracasts contains over 2000 video tutorials on a range of topics including Laravel, modern PHP, unit testing, and JavaScript. Boost your skills by digging into our comprehensive video library. Laravel Sponsors We would like to extend our thanks to the following sponsors for funding Laravel development. If you are interested in becoming a sponsor, please visit the Laravel Patreon page. Premium Partners Vehikl Tighten Co. Kirschbaum Development Group 64 Robots Cubet Techno Labs Cyber-Duck Many Webdock, Fast VPS Hosting DevSquad Curotec OP.GG WebReinvent Lendio Contributing Thank you for considering contributing to the Laravel framework! The contribution guide can be found in the Laravel documentation. Code of Conduct In order to ensure that the Laravel community is welcoming to all, please review and abide by the Code of Conduct. Security Vulnerabilities If you discover a security vulnerability within Laravel, please send an e-mail to Taylor Otwell via taylor@laravel.com. All security vulnerabilities will be promptly addressed. License The Laravel framework is open-sourced software licensed under the MIT license.

About us Miranda's Rescue Board of Directors Shannon Miranda - President / Founder ​ Brian Paris - Treasurer / DM Large Animal & Exotic Animal Adoption/Rescue Shannon Miranda Dog & Cat Adoption/Rescue Manager - Shannon Miranda Office Manager - Maria Website Chris Dog Training Shannon Kimber Ranch Hands James Mikayla Blake Logan Dylan Stephanie Thomas Mike - (handyman) Curtis Equine Mikayla Roseann ​ Thomas Stephanie Dylan Cute Little Critter Foster Care Granny Puppy & Kitten Foster Moms Kat Laney Farriers Roy Equine Ian - Equine / Large Livestock Jessica - Mini's / Goats Shearer Shannon Kevin Veterinarians Riverwalk Veterinary Hospital Ferndale Vet & Fortuna Vet We bid a fond farewell to our Rescue Mascot Skyy, a 180lb Harlequin Great Dane. Skyy could be found wagging his tail all day long around the rescue grounds. He was just a big happy-go-lucky guy who loved everyone! We miss you terribly big boy and our lives will never be the same without you. Shown below was one of his favorite things...getting a massage from our friend Kimber; and he loved to curl up in small dogs beds. That was Skyy, a silly goofy good boy. Dear sweet ole' buddy, now you have no more pain in your hips and now you can jump and play all you want in Doggie Paradise. Much love from your Miranda Rescue Family. Rest in Peace 2007 - 2015. Miranda's Rescue For Large & Small Animals is a no-kill rescue, adoption & sanctuary facility that brings relief to hundreds of distressed, neglected, abused & discarded animals, large & small, every year. We are a non-profit 501 (c) (3) tax-exempt public charity organziation, EIN #68-0417389. Miranda's Rescue is a 50 acre facility with 30 working acres. We are located on the corner of Drake Hill & Sandy Prairie Roads. Our property is divided into two sections. The Drake Hill Road Entrance houses our wonderful, hugable and adoptable dogs, puppies, cats & kittens while the Sandy Prairie Road Entrance houses the large & small animals up for adoption as well as sanctuary animals. We rescue dogs, cats, horses, reptiles, small mammals, domestic and game birds, tropical birds, livestock, & exotic animals such as alpacas, emus & llamas and many whatever other critter needs our help and we can accommodate. Some of our animals have found permanent refuge at our facility. Click our Link on the left "Sanctuary". There's no type of animal that we won't rescue. We've even had camels residing here before. Many of the animals are adopted out to loving homes while others live permanently on the rescue grounds as sanctuary residents. Miranda's Rescue has been recognized by the California State Assembly as the "Best Sanctuary For Abused Animals in Northern California" & the Red Cross named founder, Shannon Miranda, one of "Humboldt County's Heroes". The California State Assembly also recognized Shannon for his help with the probation youth of Humboldt County. Many people do not know the difference between a shelter and a rescue/sanctuary. WE ARE A RESCUE/SANCTUARY not a shelter. Hopefully this clears up any confusion. ANIMAL SHELTER VS. ANIMAL RESCUE/SANCTUARY: ANIMAL SHELTER: Shelters are government funded. This means that all expenses like vaccines, flea, worming, heart guard prevention and spay/neuter are paid for at a low cost by the government. When an animal at a shelter becomes ill or the shelter is too full, the only outcome is euthanasia. This is to prevent the spread of disease in the shelter and to make room for new animals otherwise millions of animals would be dumped alongside the road. It's less costly to just "get rid" of the problem then to treat. The government simply does not allow the funding to treat all of the animals in need. WE ARE AN ANIMAL RESCUE AND SANCTUARY: An animal rescue/sanctuary takes on the expense at full cost and also doesn't euthanize just because an animal becomes ill or to make room for new animals. When our rescue is full, we don't take in any new animals. Adoptable animals stay at our sanctuary until we find a loving and permanent forever home. We reserve humane euthanasia for terminally ill animals due to disease, injury or suffering that can't be alleviated and for animals that show signs of a behavioral or temperamental defect that can't be rehabilitated where placement would constitue a danger to the public or animals who would pose a public health hazard. The term unadoptable will vary between individual municipalities and rescues. Any humane euthanasia is performed and approved by licensed veterinarian clinics who are very well known and respected in our community. Our rescue always has and always will do everything possible to save an animal's life! WE RECEIVE NO GOVERNMENT FUNDING: Government funding is reserved for an animal shelter. We are an animal rescue. We have two city contracts with Fortuna and Ferndale that is "City Funded" not Federally Funded. Hopefully this clears up any confusion. Per these contracts, we take in any animal that is turned-in or picked up by local law enforcement in these two cities. Any wildlife is picked-up by the Wildlife Care Center. OUR RESCUE OPERATES FINANCIALLY with proceeds from our thrift shops in Fortuna, Eureka, McKinleyville & Garberville along with adoption fees, creative and innovative fundraising projects & donations from the private sector. Ways you can make a monetary donation: 1.) Click on the donate tab on our website to donate via paypal and to see a list of other ways you can donate. 2.) Call our Treasurer, Dean, 707.616.5018 with a credit card over the phone. 3.) Stop by one of our thrift stores and leave a check or cash at the front counter. 4.) You can mail a check to Mirandas Rescue, 1603 Sandy Prairie Rd. Fortuna, CA 95540. All funds are directly deposited into Miranda's Rescue Primary Nonprofit Business Account. The rescue would not be where it is today without its hardworking and dedicated staff & volunteers. Presently the rescue has 7 full and/or part time employees plus 1 outreach/county paid employess with an ongoing rotation of 20 part-time part-time volunteers! This does not include volunteers who stop by randomly or in outreach groups which totals over 100. Our 4 thrift stores have 17 (mostly part-time employees), 1 County paid employee and anywhere from 40-70 full and part-time volunteers throughout the year. Bless all of you for believing in the rescue's mission...to save as many animals as we possibly can! Whether you made a contribution, adopted one of our furry companions, transported animals, shopped at one of our stores, worked at an event, cleaned a horse stall, walked a dog, cleaned an enclosure or kennel, sorted clothing or answered phones we want to sincerely say to you - THANK YOU for your support in helping make our community a better place to live.

Vasavi Vidyaniketan in Cumbum Prakasam has an environment which is not only child-friendly but engaging for children to learn and have fun at the same time. It has spacious classrooms that are well-appointed with various amenities and facilities. This centre employs caring and involved certified teachers that play an instrumental role in the learning and development of the kids. This Vasavi Vidyaniketan is also listed in Schools, English Medium Schools, Schools State Syllabus, Schools Nursery To X. Vasavi Junior College is one of the most reputed colleges in AP offering Intermediate education. It was established in the year 2004 . As a leading college in AP we provide you a wide range of advanced courses that broaden minds and prepare students for their successful professions.The students here are nurtured to face the real world outside and to become self-directed in life. Sometimes students need support beyond the classroom. Support can come into any form. From child care, to counselling, to a range of events or a feeling of community. Vasavi Junior College help you build a strong network that can provide a wealth of opportunities in the future. You not only get to connect with faculty members, and get to listen to top leaders giving talks, you may also get to build academic partnerships. We provide complete comprehensive study material, test series, doubt clarifying sessions, regular tests, mentoring sessions and much more such as : Campus Setting Political Views of School or Student Body Natural Beauty of School Amenities and Extracurricular Options Clubs and Student Groups Ability to Fund Course of Study Support Services. We provide professional training to help our students to achieve their dreams and to pass out with best results as possible. We prepare students for specific examinations and tests. We boost the students’ confidence while helping them prepare better. Related Seraches Are: Vasavi institutions, Vasavi Vidya Nikethan, S.V.K.P Degree College, school education in prakasam, schooling in prakasam, best schools in prakasam, best schools in AP, top intermediate colleges in prakasam, top intermediate colleges in ap, best inter colleges in ap, best junior colleges in ap, top 10 junior colleges in ap, degree colleges in prakasam, degree colleges in ap, top 10 degree colleges in ap, best degree colleges in ap. For More Info: https://vasaviinstitutions.com or Call us: +91 9395574555, +91 8186879794 #degree colleges in prakasam #degree colleges in ap #top 10 degree colleges in ap #best degree colleges in ap

<p align="center"><a href="https://laravel.com" target="_blank"><img src="https://raw.githubusercontent.com/laravel/art/master/logo-lockup/5%20SVG/2%20CMYK/1%20Full%20Color/laravel-logolockup-cmyk-red.svg" width="400"></a></p> <p align="center"> <a href="https://travis-ci.org/laravel/framework"><img src="https://travis-ci.org/laravel/framework.svg" alt="Build Status"></a> <a href="https://packagist.org/packages/laravel/framework"><img src="https://img.shields.io/packagist/dt/laravel/framework" alt="Total Downloads"></a> <a href="https://packagist.org/packages/laravel/framework"><img src="https://img.shields.io/packagist/v/laravel/framework" alt="Latest Stable Version"></a> <a href="https://packagist.org/packages/laravel/framework"><img src="https://img.shields.io/packagist/l/laravel/framework" alt="License"></a> </p> ## About Laravel Laravel is a web application framework with expressive, elegant syntax. We believe development must be an enjoyable and creative experience to be truly fulfilling. Laravel takes the pain out of development by easing common tasks used in many web projects, such as: - [Simple, fast routing engine](https://laravel.com/docs/routing). - [Powerful dependency injection container](https://laravel.com/docs/container). - Multiple back-ends for [session](https://laravel.com/docs/session) and [cache](https://laravel.com/docs/cache) storage. - Expressive, intuitive [database ORM](https://laravel.com/docs/eloquent). - Database agnostic [schema migrations](https://laravel.com/docs/migrations). - [Robust background job processing](https://laravel.com/docs/queues). - [Real-time event broadcasting](https://laravel.com/docs/broadcasting). Laravel is accessible, powerful, and provides tools required for large, robust applications. ## Learning Laravel Laravel has the most extensive and thorough [documentation](https://laravel.com/docs) and video tutorial library of all modern web application frameworks, making it a breeze to get started with the framework. If you don't feel like reading, [Laracasts](https://laracasts.com) can help. Laracasts contains over 1500 video tutorials on a range of topics including Laravel, modern PHP, unit testing, and JavaScript. Boost your skills by digging into our comprehensive video library. ## Laravel Sponsors We would like to extend our thanks to the following sponsors for funding Laravel development. If you are interested in becoming a sponsor, please visit the Laravel [Patreon page](https://patreon.com/taylorotwell). ### Premium Partners - **[Vehikl](https://vehikl.com/)** - **[Tighten Co.](https://tighten.co)** - **[Kirschbaum Development Group](https://kirschbaumdevelopment.com)** - **[64 Robots](https://64robots.com)** - **[Cubet Techno Labs](https://cubettech.com)** - **[Cyber-Duck](https://cyber-duck.co.uk)** - **[Many](https://www.many.co.uk)** - **[Webdock, Fast VPS Hosting](https://www.webdock.io/en)** - **[DevSquad](https://devsquad.com)** - **[Curotec](https://www.curotec.com/services/technologies/laravel/)** - **[OP.GG](https://op.gg)** - **[CMS Max](https://www.cmsmax.com/)** - **[WebReinvent](https://webreinvent.com/?utm_source=laravel&utm_medium=github&utm_campaign=patreon-sponsors)** - **[Lendio](https://lendio.com)** - **[Romega Software](https://romegasoftware.com)** ## Contributing Thank you for considering contributing to the Laravel framework! The contribution guide can be found in the [Laravel documentation](https://laravel.com/docs/contributions). ## Code of Conduct In order to ensure that the Laravel community is welcoming to all, please review and abide by the [Code of Conduct](https://laravel.com/docs/contributions#code-of-conduct). ## Security Vulnerabilities If you discover a security vulnerability within Laravel, please send an e-mail to Taylor Otwell via [taylor@laravel.com](mailto:taylor@laravel.com). All security vulnerabilities will be promptly addressed. ## License The Laravel framework is open-sourced software licensed under the [MIT license](https://opensource.org/licenses/MIT).

Back to GitHub.com The GitHub Blog Primary Menu Archives Featured November 11, 2013 Archives Subscribe to GitHub’s Explore Email Jon Rohan February 13, 2013 Archives Sortable Stars Wynn Netherland All "Archives" posts November 11, 2013 Archives Product Subscribe to GitHub’s Explore Email There’s a lot happening on GitHub. As we reach closer and closer to 10 million repositories, there’s an astounding amount of activity happening every day. Our trending page is a great place to keep up Jon Rohan February 13, 2013 Archives Product Sortable Stars Stars are a great way to keep track of repositories that you find interesting. Starting today you can sort your starred repositories by when you starred them or when the repositories were last updated. Wynn Netherland December 13, 2012 Archives Customize your receipt details Does your accountant or tax collector require specific details on your receipts? You can now add information like your legal company name, billing address, and tax ID number to your receipts. Just visit your billing John Barnette September 19, 2012 Archives Events Helsinki Drinkup We are in Helsinki for Frozen Rails this week and since we enjoy this city so much we wanted to have another drinkup before the year ended. So come join @danishkhan and @demonbane at Molly Danish Khan April 18, 2012 Archives An easier way to create repositories Today we’re rolling out a new and improved flow for creating repositories on GitHub. To start off, you’ll find a new create repository button in your header. The new create a repository screen has been Kyle Neath April 9, 2011 Archives Product Issues 2.0: The Next Generation Issue management: the final frontier. Almost two years ago to the day, GitHub launched an issue tracker. Some people love it, some people hate it — but let’s not focus on the past (we’re living Kyle Neath December 9, 2010 Archives Hubcap: a Socially Aware GitHub Mac App Erik Michaels-Ober started a Kickstarter project to fund Hubcap, a proposed native Mac client for GitHub. The plan is to bring the elegance of various Twitter clients to GitHub and increase social engagement. If this Risk Olson September 23, 2010 Archives A little help for merging pull requests While you’re waiting for the long anticipated MergeButton™, I wanted to take a moment to highlight a few bits of documentation we have for pull requests. If you have any questions about how pull requests Kyle Neath September 9, 2010 Archives GitHub Meetup in Dublin – Sept 11 Join Tom, Kyle, Scott and PJ at the Guinness Gravity Bar this Saturday from 20:00. There will be a bunch of people there for the FunConf after party, so make sure to say hi to PJ Hyett August 13, 2010 Archives Design updates Earlier today we rolled out a minor design update to the site. Notably, we have a brand new home page (remember, you can always get to the homepage at http://github.com/home): It’s simpler, sweeter and to Kyle Neath View more posts Product Features Security Enterprise Customer stories Pricing Resources Platform Developer API Partners Atom Electron GitHub Desktop Support Docs Community Forum Training Status Contact Company About Blog Careers Press Shop Github Twitter link Github Facebook link Github Youtube link Github LinkedIn link Github link © 2021 GitHub, Inc. Terms Privacy