Fix deposit flaw

Fix intent and unused variable

Fix short address decoding

Build, sign and send tx instead of using `transact`

Check block number first before checking signer

Add Operator Cron jobs: SubmitBlock, ApplyDesposit

Merge pull request #90 from bun919tw/client

Add memory db in client

Move db settings from utils to child chain

Merge pull request #92 from boolafish/small_fix

Change delta from 0.01 to 0.05 for latest ganache

Merge pull request #89 from bun919tw/client

Add key to client

Merge pull request #86 from zhouer/test

Dump dict to json in explicit order to pass tests