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Enable analyzepsbt

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This commit is contained in:
Andrew Chow 2021-05-12 18:53:00 -04:00
parent b65a00f095
commit 64b30bfc3d
7 changed files with 92 additions and 88 deletions
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145
src/node/psbt.cpp
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@ -17,12 +17,9 @@ PSBTAnalysis AnalyzePSBT(PartiallySignedTransaction psbtx)
// Go through each input and build status
PSBTAnalysis result;
result.SetInvalid("Disabled");
return result;
/*
bool calc_fee = true;
CAmountMap in_amts;
// Elements things
bool needs_blinded_outputs = false;
bool has_blinded_outputs = false;
result.inputs.resize(psbtx.inputs.size());
@ -36,22 +33,23 @@ PSBTAnalysis AnalyzePSBT(PartiallySignedTransaction psbtx)
// Check for a UTXO
CTxOut utxo;
if (input.GetUTXO(utxo)) {
//TODO(gwillen) do PSBT inputs always have explicit assets & amounts?
if (!MoneyRange(utxo.nValue.GetAmount()) || !MoneyRange(in_amts[utxo.nAsset.GetAsset()] + utxo.nValue.GetAmount())) {
result.SetInvalid(strprintf("PSBT is not valid. Input %u has invalid value", i));
return result;
if (utxo.nValue.IsExplicit()) {
if (!MoneyRange(utxo.nValue.GetAmount())) {
result.SetInvalid(strprintf("PSBT is not valid. Input %u has invalid value", i));
return result;
}
} else {
needs_blinded_outputs = true;
}
in_amts[utxo.nAsset.GetAsset()] += utxo.nValue.GetAmount();
input_analysis.has_utxo = true;
} else {
if (input.non_witness_utxo && input.prev_out >= input.non_witness_utxo->vout.size()) {
if (input.non_witness_utxo && *input.prev_out >= input.non_witness_utxo->vout.size()) {
result.SetInvalid(strprintf("PSBT is not valid. Input %u specifies invalid prevout", i));
return result;
}
input_analysis.has_utxo = false;
input_analysis.is_final = false;
input_analysis.next = PSBTRole::UPDATER;
calc_fee = false;
}
if (!utxo.IsNull() && utxo.scriptPubKey.IsUnspendable()) {
@ -88,6 +86,69 @@ PSBTAnalysis AnalyzePSBT(PartiallySignedTransaction psbtx)
}
}
for (const PSBTOutput& output : psbtx.outputs) {
CTxOut txout = output.GetTxOut();
if (output.IsBlinded()) {
has_blinded_outputs = true;
if (!output.IsFullyBlinded()) {
result.next = PSBTRole::BLINDER;
}
} else {
// Find the fee output
if (txout.IsFee()) {
if (result.fee != nullopt) {
result.SetInvalid("There is more than one fee output");
return result;
}
result.fee = output.amount;
}
}
if (txout.nValue.IsExplicit() && !MoneyRange(txout.nValue.GetAmount())) {
result.SetInvalid("PSBT is not valid. Output amount invalid");
return result;
}
}
if (result.fee == nullopt) {
result.SetInvalid("PSBT missing required fee output");
return result;
}
if (needs_blinded_outputs && !has_blinded_outputs) {
result.SetInvalid("PSBT has blinded inputs but no blinded outputs. Must have at least one blinded output to balance with the inputs");
return result;
}
// Estimate the size
CMutableTransaction mtx(psbtx.GetUnsignedTx());
CCoinsView view_dummy;
CCoinsViewCache view(&view_dummy);
bool success = true;
for (unsigned int i = 0; i < psbtx.inputs.size(); ++i) {
PSBTInput& input = psbtx.inputs[i];
Coin newcoin;
if (!SignPSBTInput(DUMMY_SIGNING_PROVIDER, psbtx, i, 1, nullptr, true) || !input.GetUTXO(newcoin.out)) {
success = false;
break;
} else {
mtx.vin[i].scriptSig = input.final_script_sig;
mtx.witness.vtxinwit[i].scriptWitness = input.final_script_witness;
newcoin.nHeight = 1;
view.AddCoin(input.GetOutPoint(), std::move(newcoin), true);
}
}
if (success) {
CTransaction ctx = CTransaction(mtx);
size_t size = GetVirtualTransactionSize(ctx, GetTransactionSigOpCost(ctx, view, STANDARD_SCRIPT_VERIFY_FLAGS));
result.estimated_vsize = size;
// Estimate fee rate
CFeeRate feerate(*result.fee, size);
result.estimated_feerate = feerate;
}
// Calculate next role for PSBT by grabbing "minimum" PSBTInput next role
result.next = PSBTRole::EXTRACTOR;
for (unsigned int i = 0; i < psbtx.inputs.size(); ++i) {
@ -96,64 +157,6 @@ PSBTAnalysis AnalyzePSBT(PartiallySignedTransaction psbtx)
}
assert(result.next > PSBTRole::CREATOR);
if (calc_fee) {
// Get the output amount
CAmountMap out_amts = std::accumulate(psbtx.tx->vout.begin(), psbtx.tx->vout.end(), CAmountMap(),
[](CAmountMap a, const CTxOut& b) {
CAmount acc = a[b.nAsset.GetAsset()];
CAmount add = b.nValue.GetAmount();
if (!MoneyRange(acc) || !MoneyRange(add) || !MoneyRange(acc + add)) {
CAmountMap invalid;
invalid[::policyAsset] = CAmount(-1);
return invalid;
}
a[b.nAsset.GetAsset()] += add;
return a;
}
);
if (!MoneyRange(out_amts)) {
result.SetInvalid(strprintf("PSBT is not valid. Output amount invalid"));
return result;
}
// Get the fee
CAmountMap fee = in_amts - out_amts;
result.fee = fee;
// Estimate the size
CMutableTransaction mtx(psbtx.GetUnsignedTx());
CCoinsView view_dummy;
CCoinsViewCache view(&view_dummy);
bool success = true;
for (unsigned int i = 0; i < psbtx.inputs.size(); ++i) {
PSBTInput& input = psbtx.inputs[i];
Coin newcoin;
if (!SignPSBTInput(DUMMY_SIGNING_PROVIDER, psbtx, i, 1, nullptr, true) || !input.GetUTXO(newcoin.out)) {
success = false;
break;
} else {
mtx.vin[i].scriptSig = input.final_script_sig;
mtx.witness.vtxinwit[i].scriptWitness = input.final_script_witness;
newcoin.nHeight = 1;
view.AddCoin(input.GetOutPoint(), std::move(newcoin), true);
}
}
if (success) {
CTransaction ctx = CTransaction(mtx);
size_t size = GetVirtualTransactionSize(ctx, GetTransactionSigOpCost(ctx, view, STANDARD_SCRIPT_VERIFY_FLAGS));
result.estimated_vsize = size;
// Estimate fee rate
CFeeRate feerate(fee[::policyAsset], size);
result.estimated_feerate = feerate;
}
}
return result;
*/
}