menta

MENTA

A super simple framework for creating Tendermint (permissioned) blockchain applications.

But what about Cosmos-SDK ? Good question. If you're building a public application or planning to deploy to Cosmos, you should definitely use it.

Menta is designed primarily for enterprise/permissioned blockchains where there's a need to increase confidence in transactions among parties to the systems.

This framework is for:

• Enterprise blockchains that desire Byzantine Fault Tolerance
• Rapid prototyping and small pilot projects
• Folks looking to build Tendermint applications not destined for the Cosmos, or
• Folks just wanting to learn how a Tendermint ABCI works

Menta provides a simple/minimal API on top of Tendermint based on our experience building many Tendermint applications from scratch. It also adopts some of the code and practices from the Cosmos SDK.

Of course, you can always start here and port to the Cosmos SDK later. That's the magic of Tendermint ABCI!

Transaction Codec

Menta uses protobuf for the base transaction model. It's a minimal model leaving it up to the user to decide how to encode/decode application specific messages (msg field). The Tx wrapper provides a way to route and transport application specific messages to menta handlers.

 message Tx {
   string service = 1;
   bytes msg = 2;
   uint32 msgid = 3
   bytes sender = 4;
   bytes nonce = 5;
   bytes sig = 6;
 }

• service is use to route transactions to a specific Service.
• msg is an encoded application specific message. How you encode the msg is up to you.
• msgid can be used to distinquish messages for decoding
• sender is an optional field to store the wallet address of the sender
• nonce is an optional field to store a unique transaction nonce. Often used when signing the transaction
• sig is an optional field to store a cryptographic signature

tx.go in types provides functionality for signing and verifying transactions.

Setup

Current supported Tendermint version: v0.32.0

Requires Go >= 1.12

Get menta: go get -u github.com/davebryson/menta

Example

See examples/counter for a complete example of a simple application