Pay to Public Key Hash

Pay-to-PubKey-Hash (P2PKH) contract is used to send bitcoins to a bitcoin address. It is the most common contract on the Bitcoin network. Such contracts are unlocked by the public key and a signature created by the corresponding private key.

contract P2PKH {
    Ripemd160 pubKeyHash;

    public function unlock(Sig sig, PubKey pubKey) {
        require(hash160(pubKey) == this.pubKeyHash);
        require(checkSig(sig, pubKey));
    }
}