Usage no npm install needed!

<script type="module">
  import bitcoinUtil from 'https://cdn.skypack.dev/bitcoin-util';
</script>

README

bitcoin-util

Utility functions for Bitcoin hashes and targets

Usage

npm install bitcoin-util

Methods

`toHash(hex)`

Takes a hex string that contains a Bitcoin hash as input, and returns a Bitcoin-protocol-friendly little-endian Buffer. Throws an error if the hex string is not of length 64 (representing a 256-bit hash).

`compressTarget(target)`

Converts the difficulty target target to its compact representation (used in the "bits" field in block headers). target should be a Buffer (little-endian, the zeroes should be at the end). Returns a number.

`expandTarget(bits)`

Converts the compressed target integer bits to its target hash representation. Returns a Buffer.