blake

An experimental client-side taproot wallet for the Bitcoin BLAKE2b chain, mainnet. A playground copy of blaketest with the network switched.

Live: https://play-grounds.github.io/blake/

Read this first

• Playground software. Unaudited, single-file, written in a day. Use only amounts you can afford to lose.
• Keys are stored unencrypted in your browser's local storage. Anyone with access to this browser profile has your coins.
• It spends only on the BLAKE2b chain. Every spend is signed with SIGHASH_ALL | SIGHASH_UNIFIED (0x21), which nodes without the hardfork cannot verify, so a spend here can never be replayed onto the SHA256d chain. Coins at the same address on the SHA256d chain are never touched.
• The address scheme is not BIP86. The x-only public key is used directly as the taproot output key, with no tweak, so the bc1p address and the Nostr npub are the same key. Importing a key from Sparrow or Shrike gives a different address than those wallets show for it.

What it does

• Generates or imports a key (hex, Nostr nsec, or WIF).
• Shows balance and history from an Esplora-style API. Default is https://mempool.kilombino.com/api, a self-hosted instance of the mempool.guide software on the BLAKE2b chain. mempool.guide itself would be the obvious default, but its mainnet API sends no Access-Control-Allow-Origin header, so browsers cannot call it; use ?api= to switch if that changes.
• Sends to bc1q, bc1p and P2WSH addresses, RBF on, unified sighash always.
• Can relay a legacy-signed payment made to your address on the SHA256d chain onto the BLAKE2b chain, if its inputs exist there. It signs nothing for this.

Pointing it at your own node

https://play-grounds.github.io/blake/?api=http://localhost:3006/api
https://play-grounds.github.io/blake/?api=reset

The base must serve address/:a, address/:a/txs, address/:a/utxo, v1/fees/recommended, and POST tx.

Files

Same layout as blaketest: index.html (Preact plus htm, no build step), bitcoin.js, unified.js with the unified sighash for all four script types, the Knots spec and 166 vectors, and test.mjs.

npm install
npm test

Origin

Derived from testcoin.org via blaketest. Part of awesome-bitcoin-blake.