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#420 - recover function for sign transaction

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This commit is contained in:
Vlad Dobromyslov 2022-08-30 08:19:43 +03:00
parent 7b574e3db2
commit db244887c2
2 changed files with 36 additions and 0 deletions
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34
libraries/plugins/peerplays_sidechain/ethereum/transaction.cpp
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@ -129,6 +129,40 @@ void raw_transaction::deserialize(const std::string &raw_tx) {
//! signed_transaction
std::string signed_transaction::recover(const std::string &chain_id) const {
fc::ecc::compact_signature input64;
fc::from_hex(r, (char *)&input64.at(1), 32);
fc::from_hex(v, (char *)&input64.at(0), 1);
int recid = input64.at(0) - from_hex<int>(chain_id) * 2 - 35;
fc::from_hex(s, (char *)&input64.at(33), 32);
secp256k1_ecdsa_recoverable_signature sig;
FC_ASSERT(secp256k1_ecdsa_recoverable_signature_parse_compact(eth_context(), &sig, (const unsigned char *)&input64.data[1], recid));
raw_transaction tr;
tr.nonce = nonce;
tr.gas_price = gas_price;
tr.gas_limit = gas_limit;
tr.to = to;
tr.value = value;
tr.data = data;
tr.chain_id = chain_id;
secp256k1_pubkey rawPubkey;
FC_ASSERT(secp256k1_ecdsa_recover(eth_context(), &rawPubkey, &sig, (const unsigned char *)tr.hash().data()));
std::array<uint8_t, 65> pubkey;
size_t biglen = 65;
FC_ASSERT(secp256k1_ec_pubkey_serialize(eth_context(), pubkey.data(), &biglen, &rawPubkey, SECP256K1_EC_UNCOMPRESSED));
const std::string out = std::string(pubkey.begin(), pubkey.end()).substr(1);
bytes hash;
hash.resize(32);
keccak_256((const unsigned char *)out.data(), out.size(), (unsigned char *)hash.data());
return add_0x(fc::to_hex((char *)&hash[0], hash.size()).substr(24));
}
std::string signed_transaction::serialize() const {
rlp_encoder encoder;
const std::string serialized = encoder.encode(remove_0x(nonce)) +

2
libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/ethereum/transaction.hpp
View file

@ -55,6 +55,8 @@ public:
std::string r;
std::string s;
std::string recover(const std::string &chain_id) const;
virtual std::string serialize() const override;
virtual void deserialize(const std::string &raw_tx) override;
};