FAQ Appendix: Transaction Family Prefixes
This is an unofficial list of some Transaction Family (TF) prefixes. There is no central registry, most or all of these TFs are found on GitHub ( https://github.com/ especially https://github.com/hyperledger and https://github.com/hyperledger-labs ).
Sawtooth addresses are 70 hex characters. The prefix is either the first 6 characters of the SHA-512 hash of the namespace, or, for some base namespaces, a "hex word". The Sawtooth Validator registry is an outlier. It uses the SHA-256 hash (not SHA-512) and hashes "validator_registry" (not "sawtooth_validator_registry"). The remainder of the address is TF-specific and defined for each TF. Listing of a TF does not imply endorsement.
All data payloads are encoded in base64 after serializing. Sawtooth headers are serialized with Protobuf.
For base TF specifications, see Transaction Family Specifications
| TRANSACTION FAMILY NAME | SERIAL- IZATION | PREFIX | PREFIX ENCODING |
|---|---|---|---|
| settings | Protobuf | 000000 | Validator settings. Only required TF |
| identity | Protobuf | 00001d | Validator Identity for TP/Validator keys |
| sawtooth _validator _registry | Protobuf | 6a4372 | PoET Validator Registry. Used by PoET consensus to track other validators. See note above about hash prefix . |
| blockinfo | Protobuf | 00b10c | Validator Block Info. Used for SETH 00b10c00 metadata namespace info about other namespaces 00b10c01 block info namespace historic block info 00b10c0100….00<block # in hex> info on block at block # |
| sabre | Protobuf | 00ec00 00ec01 00ec02 | WebAssembly VM: NamespaceRegistry Wasm: ContractRegistry Wasm: Contracts |
| seth | Protobuf | a68b06 | SETH (Sawtooth Ethereum VM) |
| pdo_ contract_ instance_ registry | Protobuf | aa2a93 | Private Data Objects (PDO) Contract Instance Registry |
| pdo_ contract_ enclave_ registry | Protobuf | 0b936f | Private Data Objects (PDO) Contract Enclave Registry |
| ccl_ contract_ contract_ state_ registry | Protobuf | db13a2 | Private Data Objects (PDO) Coordination and Commit Log (CCL) Contract State Registry |
| SOME EXAMPLE TFs | |||
| battleship | JSON | 6e10df | Battleship example game |
| intkey | CBOR | 1cf126 | Integer Key. Full production example |
| smallbank | Protobuf | 332514 | Small Bank example app |
| xo | CSV-UTF8 | 5b7349 | Tic-tac-toe example game |
| supply_chain | Protobuf | 3400de | Asset (Fish) Supply Chain example app |
| marketplace | Protobuf | cd6744 | Marketplace example app |
| transfer- chain | JSON-UTF8 | 19d832 | Simple Tuna Supply Chain app. Used for edX LFS171x class |
| simplewallet | CSV-UTF8 | 7e2664 | Simple Wallet minimal example |
| cookiejar | CSV-UTF8 | a4d219 | Cookie Jar minimal example |
| simple_ supply | Protobuf | 5d6af4 | Simple Supply example used for future edX LFS201 class |
| pirate-talk | UTF8 | aaaaaa | Pirate Talk minimal example |
| cookie-maker | raw | 1a5312 | Cookie Maker minimal example |
| SOME THIRD-PARTY PRODUCTION TFs | |||
| rbac | Protobuf | 8563d0 | T-Mobile NEXT Identity Platform |
| sawtoothekyc | Protobuf | dbf420 | Primechain Blockchain-eKYC bank records |
| pub_key | Protobuf | a23be1 | REMME REMChain |
| bitagora- ballots | JSON | b42861 | Bitagora voting ballot |
| bitagora- polls | JSON | 154f9c | Bitagora voting polls |
