Funding, signing and committing wallet transactions

1751                            + "\nCreate the same PSBT as the above one instead using named arguments:\n"
1752                            + HelpExampleCli("-named walletcreatefundedpsbt", "outputs=\"[{\\\"" + EXAMPLE_ADDRESS[0] + "\\\":0.5}]\" add_inputs=true fee_rate=2")
1753                                },
1754        [](const RPCMethod& self, const JSONRPCRequest& request) -> UniValue
1755{
1756    std::shared_ptr<CWallet> const pwallet = GetWalletForJSONRPCRequest(request);
1757    if (!pwallet) return UniValue::VNULL;
1758
1759    CWallet& wallet{*pwallet};
1760    // Make sure the results are valid at least up to the most recent block
1761    // the user could have gotten from another RPC command prior to now
1762    wallet.BlockUntilSyncedToCurrentChain();
1763
1764    UniValue options{request.params[3].isNull() ? UniValue::VOBJ : request.params[3]};
1765
1766    CCoinControl coin_control;
1767    coin_control.m_version = self.Arg<uint32_t>("version");
1768
1769    const UniValue &replaceable_arg = options["replaceable"];
1770    const bool rbf{replaceable_arg.isNull() ? wallet.m_signal_rbf : replaceable_arg.get_bool()};
1771    CMutableTransaction rawTx = ConstructTransaction(request.params[0], request.params[1], request.params[2], rbf, coin_control.m_version);
1772    UniValue outputs(UniValue::VOBJ);
1773    outputs = NormalizeOutputs(request.params[1]);
1774    std::vector<CRecipient> recipients = CreateRecipients(
1775            ParseOutputs(outputs),
1776            InterpretSubtractFeeFromOutputInstructions(options["subtractFeeFromOutputs"], outputs.getKeys())
1777    );
1778    // Automatically select coins, unless at least one is manually selected. Can
1779    // be overridden by options.add_inputs.
1780    coin_control.m_allow_other_inputs = rawTx.vin.size() == 0;
1781    SetOptionsInputWeights(request.params[0], options);
1782    // Clear tx.vout since it is not meant to be used now that we are passing outputs directly.
1783    // This sets us up for a future PR to completely remove tx from the function signature in favor of passing inputs directly
1784    rawTx.vout.clear();
1785    auto txr = FundTransaction(wallet, rawTx, recipients, options, coin_control, /*override_min_fee=*/true);
1786
1787    // Make a blank psbt
1788    uint32_t psbt_version = 2;
1789    if (!request.params[6].isNull()) {
1790        psbt_version = request.params[6].getInt<int>();
1791    }
1792    if (psbt_version != 2 && psbt_version != 0) {
1793        throw JSONRPCError(RPC_INVALID_PARAMETER, "The PSBT version can only be 2 or 0");
1794    }
1795
1796    PartiallySignedTransaction psbtx(CMutableTransaction(*txr.tx), psbt_version);
1797
1798    // Fill transaction with out data but don't sign
1799    bool bip32derivs = request.params[4].isNull() ? true : request.params[4].get_bool();
1800    bool complete = true;
1801    const auto err{wallet.FillPSBT(psbtx, {.sign = false, .bip32_derivs = bip32derivs}, complete)};
1802    if (err) {
1803        throw JSONRPCPSBTError(*err);
1804    }
1805
1806    // Serialize the PSBT
1807    DataStream ssTx{};
1808    ssTx << psbtx;
1809
1810    UniValue result(UniValue::VOBJ);
1811    result.pushKV("psbt", EncodeBase64(ssTx.str()));
1812    result.pushKV("fee", ValueFromAmount(txr.fee));
1813    result.pushKV("changepos", txr.change_pos ? (int)*txr.change_pos : -1);
1814    return result;
1815},
1816    };
1817}
1818} // namespace wallet
1819