Crate 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.

Usage as part of pallas

When depending on the umbrella pallas crate, this crate is re-exported as pallas::txbuilder.

Structs

BuiltTransaction

A fully built (and possibly signed) transaction ready to submit.

Bytes

Owned variable-length byte buffer used for asset names, datum payloads, etc.

Bytes32

Fixed-length 32-byte buffer (transaction hashes, datum hashes, public keys).

ExUnits

Plutus script execution budget.

Input

Reference to a single transaction output (consumed or referenced).

Output

Transaction output being produced.

StagingTransaction

In-progress transaction that converts to a BuiltTransaction via an era-specific build trait.

Enums

ScriptKind

Discriminator selecting a script language.

TxBuilderError

Errors produced while staging, building, or signing a transaction.

Traits

BuildConway

Conway-era build step: converts a StagingTransaction into a BuiltTransaction with no automatic fee/ex-units calculation.