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cltv-vaults

v1.0.0

Published

Vaults for utxo coins using CLTV

Downloads

2

Readme

cltv-vaults

Javascript library to create and spend from CLTV vaults.

SimpleVault

A Simple Vault is a plain CLTV vault that checks the locktime and then does a p2pk validation. This is optimized for transaction size and is useful for vaults that are private and do not need the Vault Script to be shared with anyone.

p2sh script template:

<height> OP_CHECKLOCKTIMEVERIFY OP_DROP <pubkey> OP_CHECKSIG

scriptSig template:

<signature> <p2sh script>

This script protocol is used by, for example, coinb.in.

HashVault

A Hash Vault is a CLTV vault that checks locktime and then turns into a p2pkh transaction. This is useful when the Vault Script needs to be shared to proof that the funds are really locked, as this does not expose the public key. Transactions that redeem from a HashVault are larger than those that redeem a SimpleVault because the full public key needs to be included on the scriptSig stack.

This script protocol was originally proposed by Peter Todd in the BIP-65 spec.

p2sh script template:

<height> OP_CHECKLOCKTIMEVERIFY OP_DROP OP_DUP OP_HASH160 <pubkeyhash> OP_EQUALVERIFY OP_CHECKSIG

scriptSig template:

<signature> <pubkey> <p2sh script>

VaultTransactionFactory

Generates transactions to empty a vault after expiry, based on the Vault Script provided. Callers are expected to bring their own utxos.

Note that for all vault types, it is recommended to empty these completely after the timelock expires.

Usage

See the examples directory.