Closes #7073 As part of the 0.36 cycle we've discussed and decided to remove the mutex in tendermint that protects the ABCI application. First, applications should be able to be responsible for their own concurrency control, and can make more fine-grained decisions about concurrent use than tendermint ever could. Second, I've observed in recent weeks as we've been making this change that the mutex wasn't applied particularly consistently in many cases (e.g. multiple "local" connections to the application had multiple locks, etc.) so this will give more consistent experiences across ABCI execution environments, and simplifies the tendermint ABCI handling code.
Application BlockChain Interface (ABCI)
Blockchains are systems for multi-master state machine replication. ABCI is an interface that defines the boundary between the replication engine (the blockchain), and the state machine (the application). Using a socket protocol, a consensus engine running in one process can manage an application state running in another.
Previously, the ABCI was referred to as TMSP.
The community has provided a number of additional implementations, see the Tendermint Ecosystem
Installation & Usage
To get up and running quickly, see the getting started guide along with the abci-cli documentation which will go through the examples found in the examples directory.
Specification
A detailed description of the ABCI methods and message types is contained in:
Protocol Buffers
To compile the protobuf file, run (from the root of the repo):
make protoc_abci
See protoc --help and the Protocol Buffers site
for details on compiling for other languages. Note we also include a GRPC
service definition.