Sha256: c270b956873bef987c8806de8fe2db44d2ec09a7701f77f9409131e7b96454a0
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Size: 1.68 KB
Versions: 8
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Stored size: 1.68 KB
Contents
# frozen_string_literal: true
module Bitcoin
module Wallet
module Signer
def self.sign(wallet, account_name, tx)
account = find_account(wallet, account_name)
return unless account
tx.inputs.each.with_index do |input, index|
spec = input_spec(wallet, account, tx, index)
next unless spec
sign_tx_for_p2wpkh(tx, index, spec[0], spec[1])
end
tx
end
private
def self.input_spec(wallet, account, tx, index)
input = tx.inputs[index]
return unless input
utxo = wallet.utxo_db.get_utxo(input.out_point)
return unless utxo
script_pubkey = utxo.script_pubkey
_, _, key_purpose, key_index = wallet.db.get_key_index(script_pubkey)
return unless key_index
path = [account.path, key_purpose, key_index].join('/')
key = wallet.master_key.derive(path).key
return unless key
[key, utxo.value]
end
def self.find_account(wallet, account_name)
wallet.accounts.find{|a| a.name == account_name}
end
def self.sign_tx_for_p2wpkh(tx, index, key, amount)
sig = to_sighash(tx, index, key, amount)
tx.inputs[index].script_witness = Bitcoin::ScriptWitness.new.tap do |witness|
witness.stack << sig << key.pubkey.htb
end
end
def self.to_sighash(tx, index, key, amount)
sighash = tx.sighash_for_input(index, to_p2wpkh(key), amount: amount, sig_version: :witness_v0)
key.sign(sighash) + [Bitcoin::SIGHASH_TYPE[:all]].pack('C')
end
def self.to_p2wpkh(key)
Bitcoin::Script.to_p2wpkh(Bitcoin.hash160(key.pubkey))
end
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems