Function GetKeyForDestination

src/script/signingprovider.cpp:191–222

}

CKeyID GetKeyForDestination(const SigningProvider& store, const CTxDestination& dest)
{
    // Only supports destinations which map to single public keys:
    // P2PKH, P2WPKH, P2SH-P2WPKH, P2TR
    if (auto id = std::get_if<PKHash>(&dest)) {
        return ToKeyID(*id);
    }
    if (auto witness_id = std::get_if<WitnessV0KeyHash>(&dest)) {
        return ToKeyID(*witness_id);
    }
    if (auto script_hash = std::get_if<ScriptHash>(&dest)) {
        CScript script;
        CScriptID script_id(*script_hash);
        CTxDestination inner_dest;
        if (store.GetCScript(script_id, script) && ExtractDestination(script, inner_dest)) {
            if (auto inner_witness_id = std::get_if<WitnessV0KeyHash>(&inner_dest)) {
                return ToKeyID(*inner_witness_id);
            }
        }
    }
    if (auto output_key = std::get_if<WitnessV1Taproot>(&dest)) {
        TaprootSpendData spenddata;
        CPubKey pub;
        if (store.GetTaprootSpendData(*output_key, spenddata)
            && !spenddata.internal_key.IsNull()
            && spenddata.merkle_root.IsNull()
            && store.GetPubKeyByXOnly(spenddata.internal_key, pub)) {
            return pub.GetID();
        }
    }
    return CKeyID();
}