Pallas TxBuilder

Ergonomic builder for constructing and signing Cardano transactions. The crate is organised around StagingTransaction, a fluent builder that collects inputs, outputs, mint, scripts, datums, and redeemers, and finalises into a BuiltTransaction ready to be signed and submitted.

Currently the only era supported for building is Conway (via the BuildConway trait). Earlier-era builders are intentionally not maintained.

Usage

use pallas_txbuilder::{BuildConway, Input, Output, StagingTransaction};

let tx = StagingTransaction::new()
    .input(Input::new(prev_tx_hash, 0))
    .output(Output::new(recipient_address, 2_000_000))
    .fee(170_000)
    .build_conway_raw()?;

let signed = tx.sign(&signing_key)?;
let cbor = signed.tx_bytes;

Overview

• StagingTransaction — the in-progress, mutable transaction; the entry point for everything (new, input, output, mint, fee, network_id, valid_after, …).
• BuiltTransaction — the finalised, encoded body produced by BuildConway; exposes sign(&signer) and the raw CBOR bytes.
• Input, Output, ExUnits, ScriptKind, Bytes, Bytes32 — the value types that go into the builder.
• BuildConway trait — implemented for StagingTransaction; turns staging state into a Conway-encoded transaction.
• TxBuilderError — the unified error returned from build / sign.