blvm-muhash

MuHash3072 for Bitcoin UTXO set hashing. Matches Bitcoin Core gettxoutsetinfo muhash output for AssumeUTXO compatibility.

Features

• Core-compatible — Produces identical hashes to Bitcoin Core's MuHash3072
• Incremental — Insert and remove elements without full recomputation
• Mergeable — Combine hashes for parallel processing
• No bitcoin- deps* — Pure Rust with sha2, chacha20, cipher

Installation

Add to your Cargo.toml:

[dependencies]
blvm-muhash = "0.1"

Usage

use blvm_muhash::{MuHash3072, serialize_coin_for_muhash};

// Serialize a UTXO for hashing (matches Core TxOutSer format)
let txid = [0u8; 32];
let vout = 0u32;
let height = 100u32;
let is_coinbase = true;
let amount = 50_0000_0000i64; // 50 BTC in satoshis
let script_pubkey = vec![0x76, 0xa9, 0x14]; // P2PKH prefix

let serialized = serialize_coin_for_muhash(&txid, vout, height, is_coinbase, amount, &script_pubkey);

// Hash the UTXO set (iterate in lexicographic order by outpoint)
let hash = MuHash3072::new()
    .insert(&serialized)
    .finalize();

assert_eq!(hash.len(), 32);

API

License

MIT