Install abci by entering the following commands in the terminal:
sudo apt update sudo apt install abci
Tendermint's Serverside Blockchain API
Blockchains are a system for multi-master state machine replication. ABCI (Application BlockChain Interface) is an interface that defines the boundary between the replication engine (the blockchain), and the state machine (the application). By using a socket protocol, Tendermint enable a consensus engine running in one process to manage an application state running in another. . Previously, the ABCI was just referred to as TMSP.