Sawtooth Sabre is a transaction family which implements on-chain smart contracts executed in a WebAssembly virtual machine. This distributed application runs on top of Sawtooth, an enterprise blockchain. To learn more about Sawtooth please see the sawtooth-core repo or its published docs.
Sawtooth Sabre documentation can be found here: https://sawtooth.splinter.dev/docs/1.2/sabre/sabre_transaction_family.html
Sawtooth software is licensed under the Apache License Version 2.0 software license.