pallas-traverse

Pallas Traverse

A read-only, era-agnostic view over Cardano blocks and transactions. Where pallas-primitives exposes the raw typed CBOR per era, this crate hides the era split behind MultiEra* enums so a single piece of indexing or analysis code can run against everything from Byron to Conway.

This is the read side of the ledger. For tx construction see pallas-txbuilder; for ledger-rule validation see pallas-validate.

Usage

use pallas_traverse::MultiEraBlock;

let block = MultiEraBlock::decode(&cbor_bytes)?;

println!("era={:?} slot={} hash={}", block.era(), block.slot(), block.hash());

for tx in block.txs() {
    for output in tx.outputs() {
        println!("  → {} lovelace", output.lovelace_amount());
    }
}

Overview

• MultiEraBlock, MultiEraTx, MultiEraHeader — top-level entry points with decode / decode_for_era constructors.
• MultiEraInput, MultiEraOutput, MultiEraValue, MultiEraAsset, MultiEraPolicyAssets — per-piece views.
• MultiEraCert, MultiEraRedeemer, MultiEraWithdrawals, MultiEraSigners, MultiEraMeta, MultiEraUpdate, MultiEraProposal, MultiEraGovAction — the rest of the tx surface, normalised across eras.
• Era and Feature — discriminators for "which era is this" and "does this era support X" (multi-assets, smart contracts, CIP-1694, …).
• Trait-driven hashing: ComputeHash<N> and OriginalHash<N> give you a uniform way to take Blake2b digests of typed structures.
• Per-aspect submodules for deeper helpers: block, tx, input, output, assets, value, cert, redeemers, witnesses, signers, hashes, fees, governance, time, header, meta, auxiliary, probe, size, withdrawals, wellknown.