diff options
Diffstat (limited to 'src/rpc/rawtransaction.cpp')
| -rw-r--r-- | src/rpc/rawtransaction.cpp | 338 |
1 files changed, 338 insertions, 0 deletions
diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp index 4d8a1b87fc..38e2dc237e 100644 --- a/src/rpc/rawtransaction.cpp +++ b/src/rpc/rawtransaction.cpp @@ -7,6 +7,7 @@ #include <coins.h> #include <compat/byteswap.h> #include <consensus/validation.h> +#include <consensus/tx_verify.h> #include <core_io.h> #include <index/txindex.h> #include <init.h> @@ -31,6 +32,8 @@ #include <validation.h> #include <validationinterface.h> + +#include <numeric> #include <stdint.h> #include <univalue.h> @@ -1703,6 +1706,338 @@ UniValue converttopsbt(const JSONRPCRequest& request) return EncodeBase64((unsigned char*)ssTx.data(), ssTx.size()); } +UniValue utxoupdatepsbt(const JSONRPCRequest& request) +{ + if (request.fHelp || request.params.size() != 1) { + throw std::runtime_error( + RPCHelpMan{"utxoupdatepsbt", + "\nUpdates a PSBT with witness UTXOs retrieved from the UTXO set or the mempool.\n", + { + {"psbt", RPCArg::Type::STR, RPCArg::Optional::NO, "A base64 string of a PSBT"} + }, + RPCResult { + " \"psbt\" (string) The base64-encoded partially signed transaction with inputs updated\n" + }, + RPCExamples { + HelpExampleCli("utxoupdatepsbt", "\"psbt\"") + }}.ToString()); + } + + RPCTypeCheck(request.params, {UniValue::VSTR}, true); + + // Unserialize the transactions + PartiallySignedTransaction psbtx; + std::string error; + if (!DecodeBase64PSBT(psbtx, request.params[0].get_str(), error)) { + throw JSONRPCError(RPC_DESERIALIZATION_ERROR, strprintf("TX decode failed %s", error)); + } + + // Fetch previous transactions (inputs): + CCoinsView viewDummy; + CCoinsViewCache view(&viewDummy); + { + LOCK2(cs_main, mempool.cs); + CCoinsViewCache &viewChain = *pcoinsTip; + CCoinsViewMemPool viewMempool(&viewChain, mempool); + view.SetBackend(viewMempool); // temporarily switch cache backend to db+mempool view + + for (const CTxIn& txin : psbtx.tx->vin) { + view.AccessCoin(txin.prevout); // Load entries from viewChain into view; can fail. + } + + view.SetBackend(viewDummy); // switch back to avoid locking mempool for too long + } + + // Fill the inputs + for (unsigned int i = 0; i < psbtx.tx->vin.size(); ++i) { + PSBTInput& input = psbtx.inputs.at(i); + + if (input.non_witness_utxo || !input.witness_utxo.IsNull()) { + continue; + } + + const Coin& coin = view.AccessCoin(psbtx.tx->vin[i].prevout); + + std::vector<std::vector<unsigned char>> solutions_data; + txnouttype which_type = Solver(coin.out.scriptPubKey, solutions_data); + if (which_type == TX_WITNESS_V0_SCRIPTHASH || which_type == TX_WITNESS_V0_KEYHASH || which_type == TX_WITNESS_UNKNOWN) { + input.witness_utxo = coin.out; + } + } + + CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION); + ssTx << psbtx; + return EncodeBase64((unsigned char*)ssTx.data(), ssTx.size()); +} + +UniValue joinpsbts(const JSONRPCRequest& request) +{ + if (request.fHelp || request.params.size() != 1) { + throw std::runtime_error( + RPCHelpMan{"joinpsbts", + "\nJoins multiple distinct PSBTs with different inputs and outputs into one PSBT with inputs and outputs from all of the PSBTs\n" + "No input in any of the PSBTs can be in more than one of the PSBTs.\n", + { + {"txs", RPCArg::Type::ARR, RPCArg::Optional::NO, "A json array of base64 strings of partially signed transactions", + { + {"psbt", RPCArg::Type::STR, RPCArg::Optional::NO, "A base64 string of a PSBT"} + }} + }, + RPCResult { + " \"psbt\" (string) The base64-encoded partially signed transaction\n" + }, + RPCExamples { + HelpExampleCli("joinpsbts", "\"psbt\"") + }}.ToString()); + } + + RPCTypeCheck(request.params, {UniValue::VARR}, true); + + // Unserialize the transactions + std::vector<PartiallySignedTransaction> psbtxs; + UniValue txs = request.params[0].get_array(); + + if (txs.size() <= 1) { + throw JSONRPCError(RPC_INVALID_PARAMETER, "At least two PSBTs are required to join PSBTs."); + } + + int32_t best_version = 1; + uint32_t best_locktime = 0xffffffff; + for (unsigned int i = 0; i < txs.size(); ++i) { + PartiallySignedTransaction psbtx; + std::string error; + if (!DecodeBase64PSBT(psbtx, txs[i].get_str(), error)) { + throw JSONRPCError(RPC_DESERIALIZATION_ERROR, strprintf("TX decode failed %s", error)); + } + psbtxs.push_back(psbtx); + // Choose the highest version number + if (psbtx.tx->nVersion > best_version) { + best_version = psbtx.tx->nVersion; + } + // Choose the lowest lock time + if (psbtx.tx->nLockTime < best_locktime) { + best_locktime = psbtx.tx->nLockTime; + } + } + + // Create a blank psbt where everything will be added + PartiallySignedTransaction merged_psbt; + merged_psbt.tx = CMutableTransaction(); + merged_psbt.tx->nVersion = best_version; + merged_psbt.tx->nLockTime = best_locktime; + + // Merge + for (auto& psbt : psbtxs) { + for (unsigned int i = 0; i < psbt.tx->vin.size(); ++i) { + if (!merged_psbt.AddInput(psbt.tx->vin[i], psbt.inputs[i])) { + throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Input %s:%d exists in multiple PSBTs", psbt.tx->vin[i].prevout.hash.ToString().c_str(), psbt.tx->vin[i].prevout.n)); + } + } + for (unsigned int i = 0; i < psbt.tx->vout.size(); ++i) { + merged_psbt.AddOutput(psbt.tx->vout[i], psbt.outputs[i]); + } + merged_psbt.unknown.insert(psbt.unknown.begin(), psbt.unknown.end()); + } + + CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION); + ssTx << merged_psbt; + return EncodeBase64((unsigned char*)ssTx.data(), ssTx.size()); +} + +UniValue analyzepsbt(const JSONRPCRequest& request) +{ + if (request.fHelp || request.params.size() != 1) { + throw std::runtime_error( + RPCHelpMan{"analyzepsbt", + "\nAnalyzes and provides information about the current status of a PSBT and its inputs\n", + { + {"psbt", RPCArg::Type::STR, RPCArg::Optional::NO, "A base64 string of a PSBT"} + }, + RPCResult { + "{\n" + " \"inputs\" : [ (array of json objects)\n" + " {\n" + " \"has_utxo\" : true|false (boolean) Whether a UTXO is provided\n" + " \"is_final\" : true|false (boolean) Whether the input is finalized\n" + " \"missing\" : { (json object, optional) Things that are missing that are required to complete this input\n" + " \"pubkeys\" : [ (array)\n" + " \"keyid\" (string) Public key ID, hash160 of the public key, of a public key whose BIP 32 derivation path is missing\n" + " ]\n" + " \"signatures\" : [ (array)\n" + " \"keyid\" (string) Public key ID, hash160 of the public key, of a public key whose signature is missing\n" + " ]\n" + " \"redeemscript\" : \"hash\" (string) Hash160 of the redeemScript that is missing\n" + " \"witnessscript\" : \"hash\" (string) SHA256 of the witnessScript that is missing\n" + " }\n" + " \"next\" : \"role\" (string) Role of the next person that this input needs to go to\n" + " }\n" + " ,...\n" + " ]\n" + " \"estimated_vsize\" : vsize (numeric) Estimated vsize of the final signed transaction\n" + " \"estimated_feerate\" : feerate (numeric, optional) Estimated feerate of the final signed transaction. Shown only if all UTXO slots in the PSBT have been filled.\n" + " \"fee\" : fee (numeric, optional) The transaction fee paid. Shown only if all UTXO slots in the PSBT have been filled.\n" + " \"next\" : \"role\" (string) Role of the next person that this psbt needs to go to\n" + "}\n" + }, + RPCExamples { + HelpExampleCli("analyzepsbt", "\"psbt\"") + }}.ToString()); + } + + RPCTypeCheck(request.params, {UniValue::VSTR}); + + // Unserialize the transaction + PartiallySignedTransaction psbtx; + std::string error; + if (!DecodeBase64PSBT(psbtx, request.params[0].get_str(), error)) { + throw JSONRPCError(RPC_DESERIALIZATION_ERROR, strprintf("TX decode failed %s", error)); + } + + // Go through each input and build status + UniValue result(UniValue::VOBJ); + UniValue inputs_result(UniValue::VARR); + bool calc_fee = true; + bool all_final = true; + bool only_missing_sigs = true; + bool only_missing_final = false; + CAmount in_amt = 0; + for (unsigned int i = 0; i < psbtx.tx->vin.size(); ++i) { + PSBTInput& input = psbtx.inputs[i]; + UniValue input_univ(UniValue::VOBJ); + UniValue missing(UniValue::VOBJ); + + // Check for a UTXO + CTxOut utxo; + if (psbtx.GetInputUTXO(utxo, i)) { + in_amt += utxo.nValue; + input_univ.pushKV("has_utxo", true); + } else { + input_univ.pushKV("has_utxo", false); + input_univ.pushKV("is_final", false); + input_univ.pushKV("next", "updater"); + calc_fee = false; + } + + // Check if it is final + if (!utxo.IsNull() && !PSBTInputSigned(input)) { + input_univ.pushKV("is_final", false); + all_final = false; + + // Figure out what is missing + SignatureData outdata; + bool complete = SignPSBTInput(DUMMY_SIGNING_PROVIDER, psbtx, i, 1, &outdata); + + // Things are missing + if (!complete) { + if (!outdata.missing_pubkeys.empty()) { + // Missing pubkeys + UniValue missing_pubkeys_univ(UniValue::VARR); + for (const CKeyID& pubkey : outdata.missing_pubkeys) { + missing_pubkeys_univ.push_back(HexStr(pubkey)); + } + missing.pushKV("pubkeys", missing_pubkeys_univ); + } + if (!outdata.missing_redeem_script.IsNull()) { + // Missing redeemScript + missing.pushKV("redeemscript", HexStr(outdata.missing_redeem_script)); + } + if (!outdata.missing_witness_script.IsNull()) { + // Missing witnessScript + missing.pushKV("witnessscript", HexStr(outdata.missing_witness_script)); + } + if (!outdata.missing_sigs.empty()) { + // Missing sigs + UniValue missing_sigs_univ(UniValue::VARR); + for (const CKeyID& pubkey : outdata.missing_sigs) { + missing_sigs_univ.push_back(HexStr(pubkey)); + } + missing.pushKV("signatures", missing_sigs_univ); + } + input_univ.pushKV("missing", missing); + + // If we are only missing signatures and nothing else, then next is signer + if (outdata.missing_pubkeys.empty() && outdata.missing_redeem_script.IsNull() && outdata.missing_witness_script.IsNull() && !outdata.missing_sigs.empty()) { + input_univ.pushKV("next", "signer"); + } else { + only_missing_sigs = false; + input_univ.pushKV("next", "updater"); + } + } else { + only_missing_final = true; + input_univ.pushKV("next", "finalizer"); + } + } else if (!utxo.IsNull()){ + input_univ.pushKV("is_final", true); + } + inputs_result.push_back(input_univ); + } + result.pushKV("inputs", inputs_result); + + if (all_final) { + only_missing_sigs = false; + result.pushKV("next", "extractor"); + } + if (calc_fee) { + // Get the output amount + CAmount out_amt = std::accumulate(psbtx.tx->vout.begin(), psbtx.tx->vout.end(), 0, + [](int a, const CTxOut& b) { + return a += b.nValue; + } + ); + + // Get the fee + CAmount fee = in_amt - out_amt; + + // Estimate the size + CMutableTransaction mtx(*psbtx.tx); + CCoinsView view_dummy; + CCoinsViewCache view(&view_dummy); + bool success = true; + + for (unsigned int i = 0; i < psbtx.tx->vin.size(); ++i) { + PSBTInput& input = psbtx.inputs[i]; + if (SignPSBTInput(DUMMY_SIGNING_PROVIDER, psbtx, i, 1, nullptr, true)) { + mtx.vin[i].scriptSig = input.final_script_sig; + mtx.vin[i].scriptWitness = input.final_script_witness; + + Coin newcoin; + if (!psbtx.GetInputUTXO(newcoin.out, i)) { + success = false; + break; + } + newcoin.nHeight = 1; + view.AddCoin(psbtx.tx->vin[i].prevout, std::move(newcoin), true); + } else { + success = false; + break; + } + } + + if (success) { + CTransaction ctx = CTransaction(mtx); + size_t size = GetVirtualTransactionSize(ctx, GetTransactionSigOpCost(ctx, view, STANDARD_SCRIPT_VERIFY_FLAGS)); + result.pushKV("estimated_vsize", (int)size); + // Estimate fee rate + CFeeRate feerate(fee, size); + result.pushKV("estimated_feerate", feerate.ToString()); + } + result.pushKV("fee", ValueFromAmount(fee)); + + if (only_missing_sigs) { + result.pushKV("next", "signer"); + } else if (only_missing_final) { + result.pushKV("next", "finalizer"); + } else if (all_final) { + result.pushKV("next", "extractor"); + } else { + result.pushKV("next", "updater"); + } + } else { + result.pushKV("next", "updater"); + } + return result; +} + // clang-format off static const CRPCCommand commands[] = { // category name actor (function) argNames @@ -1721,6 +2056,9 @@ static const CRPCCommand commands[] = { "rawtransactions", "finalizepsbt", &finalizepsbt, {"psbt", "extract"} }, { "rawtransactions", "createpsbt", &createpsbt, {"inputs","outputs","locktime","replaceable"} }, { "rawtransactions", "converttopsbt", &converttopsbt, {"hexstring","permitsigdata","iswitness"} }, + { "rawtransactions", "utxoupdatepsbt", &utxoupdatepsbt, {"psbt"} }, + { "rawtransactions", "joinpsbts", &joinpsbts, {"txs"} }, + { "rawtransactions", "analyzepsbt", &analyzepsbt, {"psbt"} }, { "blockchain", "gettxoutproof", &gettxoutproof, {"txids", "blockhash"} }, { "blockchain", "verifytxoutproof", &verifytxoutproof, {"proof"} }, |