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| __pycache__ | ||
| __pycache__ | ||
| junit-report.xml |
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catalyst_voices_packages/catalyst_cardano_serialization/README.md
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| # catalyst_cardano_serialization | ||
| # Content | ||
|
|
||
| * [Content](#content) | ||
| * [Features](#features) | ||
| * [Requirements](#requirements) | ||
| * [Install](#install) | ||
| * [Example](#example) | ||
| * [Limitations](#limitations) | ||
| * [Supported transaction body fields](#supported-transaction-body-fields) | ||
| * [Reference documentation](#reference-documentation) | ||
| * [Support](#support) | ||
| * [License](#license) | ||
|
|
||
| ## Features | ||
|
|
||
| This package comes with serialization & deserialization of data structures related to Cardano | ||
| blockchain transactions and useful utility functions. | ||
|
|
||
| The goal of the package is to generate an unsigned transaction cbor that | ||
| can be signed and submitted to the blockchain. | ||
| The package communicates neither with the wallet nor with the blockchain therefore signing | ||
| and submission are outside of scope of this package. | ||
|
|
||
| ## Requirements | ||
|
|
||
| * Dart: 3.3.0+ | ||
| * Flutter: 3.19.5+ | ||
|
|
||
| ## Install | ||
|
|
||
| ```yaml | ||
| dependencies: | ||
| catalyst_cardano_serialization: ^0.1.0 | ||
| ``` | ||
| ## Example | ||
| Import `package:catalyst_cardano_serialization/catalyst_cardano_serialization.dart`, | ||
| instantiate `TransactionBuilder`, provide transaction inputs, outputs, add change address | ||
| for any remaining unspent UTXOs and build the transaction body. | ||
|
|
||
| The transaction body must be signed by witnesses in order to be submitted to the blockchain. | ||
| Otherwise the validity of the transaction could not be established and such transaction | ||
| would be rejected. | ||
| The caller must prove that they are eligible to spend the input UTXOs. | ||
|
|
||
| ```dart | ||
| import 'package:catalyst_cardano_serialization/catalyst_cardano_serialization.dart'; | ||
| import 'package:cbor/cbor.dart'; | ||
| import 'package:convert/convert.dart'; | ||
| /* cSpell:disable */ | ||
| void main() { | ||
| const txBuilderConfig = TransactionBuilderConfig( | ||
| feeAlgo: LinearFee( | ||
| constant: Coin(155381), | ||
| coefficient: Coin(44), | ||
| ), | ||
| maxTxSize: 8000, | ||
| coinsPerUtxoByte: Coin(4310), | ||
| ); | ||
| final txMetadata = AuxiliaryData( | ||
| map: { | ||
| const CborSmallInt(1): CborString('Test'), | ||
| const CborSmallInt(2): CborBytes(hex.decode('aabbccddeeff')), | ||
| const CborSmallInt(3): const CborSmallInt(997), | ||
| const CborSmallInt(4): cbor.decode( | ||
| hex.decode( | ||
| '82a50081825820afcf8497561065afe1ca623823508753cc580eb575ac8f1d6cfa' | ||
| 'a18c3ceeac010001818258390080f9e2c88e6c817008f3a812ed889b4a4da8e0bd' | ||
| '103f86e7335422aa122a946b9ad3d2ddf029d3a828f0468aece76895f15c9efbd6' | ||
| '9b42771a00df1560021a0002e63003182f075820bdc2b27e6869aa9a5fa23a1f1f' | ||
| 'd3a87025d8703df4fd7b120d058c839dc0415c82a10141aa80', | ||
| ), | ||
| ), | ||
| }, | ||
| ); | ||
| final utxo = TransactionUnspentOutput( | ||
| input: TransactionInput( | ||
| transactionId: TransactionHash.fromHex( | ||
| '4c1fbc5433ec764164945d736a09dc087d59ff30e64d26d462ff8570cd4be9a7', | ||
| ), | ||
| index: 0, | ||
| ), | ||
| output: TransactionOutput( | ||
| address: ShelleyAddress.fromBech32( | ||
| 'addr_test1qpu5vlrf4xkxv2qpwngf6cjhtw542ayty80v8dyr49rf5ewvxwdrt70' | ||
| 'qlcpeeagscasafhffqsxy36t90ldv06wqrk2qum8x5w', | ||
| ), | ||
| amount: const Coin(10162333), | ||
| ), | ||
| ); | ||
| final txOutput = TransactionOutput( | ||
| address: ShelleyAddress.fromBech32( | ||
| 'addr_test1vzpwq95z3xyum8vqndgdd9mdnmafh3djcxnc6jemlgdmswcve6tkw', | ||
| ), | ||
| amount: const Coin(1000000), | ||
| ); | ||
| final txBuilder = TransactionBuilder( | ||
| config: txBuilderConfig, | ||
| inputs: [utxo], | ||
| // fee can be left empty so that it's auto calculated or can be hardcoded | ||
| // fee: const Coin(1000000), | ||
| ttl: const SlotBigNum(410021), | ||
| auxiliaryData: txMetadata, | ||
| networkId: NetworkId.testnet, | ||
| ); | ||
| final changeAddress = ShelleyAddress.fromBech32( | ||
| 'addr_test1qrqr2ved9h96x46yazq89yvcgk0r93gwk0shnv06yfrnfryqhpr26' | ||
| 'st0zgxmjnq6gqve99gtzxumclt9mwe5ynq03hjqgkjmhd', | ||
| ); | ||
| final txBody = txBuilder | ||
| .withOutput(txOutput) | ||
| .withChangeAddressIfNeeded(changeAddress) | ||
| // fee can be set manually or left empty to be auto calculated | ||
| // .withFee(const Coin(10000000)) | ||
| .buildBody(); | ||
| final txHash = TransactionHash.fromTransactionBody(txBody); | ||
| final witnessSet = _signTransaction(txHash); | ||
| final tx = Transaction( | ||
| body: txBody, | ||
| isValid: true, | ||
| witnessSet: witnessSet, | ||
| auxiliaryData: txMetadata, | ||
| ); | ||
| final txBytes = cbor.encode(tx.toCbor()); | ||
| final txBytesHex = hex.encode(txBytes); | ||
| print(txBytesHex); | ||
| } | ||
| TransactionWitnessSet _signTransaction(TransactionHash txHash) { | ||
| // return a fake witness set, in real world the wallet | ||
| // would sign the transaction hash and provide this | ||
| return TransactionWitnessSet( | ||
| vkeyWitnesses: { | ||
| VkeyWitness( | ||
| vkey: Vkey.fromBytes( | ||
| hex.decode( | ||
| '3311ca404fcf22c91d607ace285d70e2' | ||
| '263a1b81745c39673080329bd1a3f56e', | ||
| ), | ||
| ), | ||
| signature: Ed25519Signature.fromBytes( | ||
| hex.decode( | ||
| 'f5eb006f048fdfa9b81b0fe3abee1ce1f1a75789d' | ||
| 'c21088b23ebf95c76b050ad157a497999e083e1957' | ||
| 'c2a3d730a07a5b2aef4a755783c9ce778c02c4a08970f', | ||
| ), | ||
| ), | ||
| ), | ||
| }, | ||
| ); | ||
| } | ||
| /* cSpell:enable */ | ||
| ``` | ||
|
|
||
| ## Limitations | ||
|
|
||
| This package supports a minimal `TransactionBuilder` that does not yet work with | ||
| Smart Contracts, scripts or NFTs. | ||
| However AuxiliaryMetadata is already supported thus it's possible to fulfill some of the use cases. | ||
|
|
||
| Only Shelley era bech32 base and stake addresses are supported. | ||
| Byron era addresses are not supported. | ||
|
|
||
| ## Supported transaction body fields | ||
|
|
||
| | Field | Is supported? | | ||
| | ----- | ------------- | | ||
| | 0 = transaction inputs | ✔️ | | ||
| | 1 = transaction outputs | ✔️ | | ||
| | 2 = transaction fee | ✔️ | | ||
| | 3 = Time to live [TTL] | ✔️ | | ||
| | 4 = certificates | ❌️ | | ||
| | 5 = reward withdrawals | ❌️ | | ||
| | 6 = protocol parameter update | ❌️ | | ||
| | 7 = auxiliary_data_hash | ✔️ | | ||
| | 8 = validity interval start | ❌️ | | ||
| | 9 = mint | ❌️ | | ||
| | 11 = script_data_hash | ❌️ | | ||
| | 13 = collateral inputs | ❌️ | | ||
| | 14 = required signers | ❌️ | | ||
| | 15 = network_id | ✔️ | | ||
| | 16 = collateral return | ❌️ | | ||
| | 17 = total collateral | ❌️ | | ||
| | 18 = reference inputs | ❌️ | | ||
|
|
||
| ## Reference documentation | ||
|
|
||
| * [Cardano transaction specification](https://github.com/input-output-hk/catalyst-CIPs/blob/x509-rbac-signing-with-cip30/CIP-XXXX/README.md#specification) | ||
| * [Cardano Multiplatform Lib](https://github.com/dcSpark/cardano-multiplatform-lib) with reference | ||
| implementation for fee calculation algorithm and change address management. | ||
|
|
||
| ## Support | ||
|
|
||
| Post issues and feature requests on the GitHub [issue tracker](https://github.com/input-output-hk/catalyst-voices/issues). | ||
| Please read our [CONTRIBUTING](https://github.com/input-output-hk/catalyst-voices/blob/main/CONTRIBUTING.md) | ||
| for guidelines on how to contribute. | ||
|
|
||
| ## License | ||
|
|
||
| Licensed under either of [Apache License, Version 2.0](https://github.com/input-output-hk/catalyst-voices/blob/main/LICENSE-APACHE) | ||
| or [MIT license](https://github.com/input-output-hk/catalyst-voices/blob/main/LICENSE-MIT) | ||
| at your option. | ||
|
|
||
| Unless you explicitly state otherwise, any contribution intentionally submitted | ||
| for inclusion in this crate by you, as defined in the Apache-2.0 license, shall | ||
| be dual licensed as above, without any additional terms or conditions. |
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