Cosmos AB (Application Blockchain) without Cosmos SDK. This mini project is for understanding how Tendermint and AB interacts with ABCI.
Application in this project saves data as KV format. You can request to save the key-value data and query them.
Standalone version of AB is just running Application server without consensus mechanism. You can request to update state (deliver transaction, commit) with the CLI manually.
Install the CLI with the command:
make installRun the Application server with the command:
ab-cli kv # listening on the 0.0.0.0:26658Open up the other terminal window, then send the request to save:
ab-cli tx "\"abc=def\""The response should be similar to as follows
{"level":"info","module":"ab-client","impl":"grpcClient","service":"grpcClient","time":"2022-04-24T19:03:32+09:00","message":"starting service"}
{"level":"info","module":"ab-client","addr":"tcp://0.0.0.0:26658","time":"2022-04-24T19:03:32+09:00","message":"Dialed server. Waiting for echo."}
-> code: OK
Then if you want to query the data you've saved, then run the command:
ab-cli query "\"abc\""You can see the log with the value of exists
{"level":"info","module":"ab-client","impl":"grpcClient","service":"grpcClient","time":"2022-04-24T19:06:26+09:00","message":"starting service"}
{"level":"info","module":"ab-client","addr":"tcp://0.0.0.0:26658","time":"2022-04-24T19:06:26+09:00","message":"Dialed server. Waiting for echo."}
-> code: OK
-> log: exists
-> height: 0
-> key: abc
-> key.hex: 616263
-> value: def
-> value.hex: 646566
If you query with the key which is not stored, then server returns the log as does not exist
ab-cli query "\"fff\""{"level":"info","module":"ab-client","impl":"grpcClient","service":"grpcClient","time":"2022-04-24T19:11:01+09:00","message":"starting service"}
{"level":"info","module":"ab-client","addr":"tcp://0.0.0.0:26658","time":"2022-04-24T19:11:01+09:00","message":"Dialed server. Waiting for echo."}
-> code: OK
-> log: does not exist
-> height: 0
-> key: fff
-> key.hex: 666666
Each peer running AB based on Tendermint can broadcast its transaction and synced its state by consensus. To integrate with Tendermint you need to install Tendermint first.