https://travis-ci.org/github/bitcoin/bitcoin/jobs/680452476#L6107
keypaths.push_back(keypath);
            }
            out.pushKV("bip32_derivs", keypaths);
        }
        
        if (output.unknown.size() > 0) {
            UniValue unknowns(UniValue::VOBJ);
            for (auto entry : output.unknown) {
                unknowns.pushKV(HexStr(entry.first), HexStr(entry.second));
            }
            out.pushKV("unknown", unknowns);
        }
        outputs.push_back(out);
        
        if (MoneyRange(psbtx.tx->vout[i].nValue) && MoneyRange(output_value + psbtx.tx->vout[i].nValue)) {
            output_value += psbtx.tx->vout[i].nValue;
        } else {
            
            have_all_utxos = false;
        }
    }
    result.pushKV("outputs", outputs);
    if (have_all_utxos) {
        result.pushKV("fee", ValueFromAmount(total_in - output_value));
    }
    return result;
},
    };
}
static RPCHelpMan combinepsbt()