This webapp uses the bcoin library, browserified and bundled with bpkg. It fetches blockchain data from the Blockstream.info API.

Usage:

• Enter the brainwallet passphrase

• The app will take the SHA256 digest of the phrase and use it as a private key

• Three address types are derived: Legacy Compressed, Legacy Uncompressed, and native SegWit

• UTXO are requested from the API for those addresses

• Enter the destination address you want to sweep the Bitcoin funds to

• Using the bcoin library, a transaction is constructed from the UTXO and the destination address. The TX is signed with the private keys derived from the brainwallet phrase

• The TX is output in raw hex, and can be pushed to the Bitcoin network via the API by clicking the button at the bottom.