Check Http Request

v2.2

check http request

v2.1

check http request

Support multi-asset

Release note

1. Support clients to create, issue and transfer multi-asset
2. Refactor transaction cache to robust smart contract transaction
3. Add RPC interface to help locate the data layer issues
4. Fix some other issues

add rpc interface

add rpc interface "blockchain_get_transaction_id" to support exchanges getting transaction id

Initial release

Initial release