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Diffstat (limited to 'src/wallet/external_signer_scriptpubkeyman.cpp')
-rw-r--r--src/wallet/external_signer_scriptpubkeyman.cpp81
1 files changed, 81 insertions, 0 deletions
diff --git a/src/wallet/external_signer_scriptpubkeyman.cpp b/src/wallet/external_signer_scriptpubkeyman.cpp
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+// Copyright (c) 2020 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <chainparams.h>
+#include <wallet/external_signer.h>
+#include <wallet/external_signer_scriptpubkeyman.h>
+
+#ifdef ENABLE_EXTERNAL_SIGNER
+
+bool ExternalSignerScriptPubKeyMan::SetupDescriptor(std::unique_ptr<Descriptor> desc)
+{
+ LOCK(cs_desc_man);
+ assert(m_storage.IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS));
+ assert(m_storage.IsWalletFlagSet(WALLET_FLAG_EXTERNAL_SIGNER));
+
+ int64_t creation_time = GetTime();
+
+ // Make the descriptor
+ WalletDescriptor w_desc(std::move(desc), creation_time, 0, 0, 0);
+ m_wallet_descriptor = w_desc;
+
+ // Store the descriptor
+ WalletBatch batch(m_storage.GetDatabase());
+ if (!batch.WriteDescriptor(GetID(), m_wallet_descriptor)) {
+ throw std::runtime_error(std::string(__func__) + ": writing descriptor failed");
+ }
+
+ // TopUp
+ TopUp();
+
+ m_storage.UnsetBlankWalletFlag(batch);
+ return true;
+}
+
+ExternalSigner ExternalSignerScriptPubKeyMan::GetExternalSigner() {
+ const std::string command = gArgs.GetArg("-signer", "");
+ if (command == "") throw std::runtime_error(std::string(__func__) + ": restart bitcoind with -signer=<cmd>");
+ std::vector<ExternalSigner> signers;
+ ExternalSigner::Enumerate(command, signers, Params().NetworkIDString());
+ if (signers.empty()) throw std::runtime_error(std::string(__func__) + ": No external signers found");
+ // TODO: add fingerprint argument in case of multiple signers
+ return signers[0];
+}
+
+bool ExternalSignerScriptPubKeyMan::DisplayAddress(const CScript scriptPubKey, const ExternalSigner &signer) const
+{
+ // TODO: avoid the need to infer a descriptor from inside a descriptor wallet
+ auto provider = GetSolvingProvider(scriptPubKey);
+ auto descriptor = InferDescriptor(scriptPubKey, *provider);
+
+ signer.DisplayAddress(descriptor->ToString());
+ // TODO inspect result
+ return true;
+}
+
+// If sign is true, transaction must previously have been filled
+TransactionError ExternalSignerScriptPubKeyMan::FillPSBT(PartiallySignedTransaction& psbt, int sighash_type, bool sign, bool bip32derivs, int* n_signed) const
+{
+ if (!sign) {
+ return DescriptorScriptPubKeyMan::FillPSBT(psbt, sighash_type, false, bip32derivs, n_signed);
+ }
+
+ // Already complete if every input is now signed
+ bool complete = true;
+ for (const auto& input : psbt.inputs) {
+ // TODO: for multisig wallets, we should only care if all _our_ inputs are signed
+ complete &= PSBTInputSigned(input);
+ }
+ if (complete) return TransactionError::OK;
+
+ std::string strFailReason;
+ if(!GetExternalSigner().SignTransaction(psbt, strFailReason)) {
+ tfm::format(std::cerr, "Failed to sign: %s\n", strFailReason);
+ return TransactionError::EXTERNAL_SIGNER_FAILED;
+ }
+ FinalizePSBT(psbt); // This won't work in a multisig setup
+ return TransactionError::OK;
+}
+
+#endif