Creating raw transaction ignores mweb unspents and create transaction with wrong value

Technical Support
, ,
1

Hi, In our tests with creating a raw tx, in a wallet with two inputs (one being a mweb utxo and other being bech32 utxo), we have:
utxo bech32 with value around of 0.0026
utxo mweb with value around of 0.0009
total is around 0.0035

then we create a raw tx

{
    "jsonrpc": "1.0",
    "id": "postman",
    "method": "createrawtransaction",
    "params": [[], {"ltc1addres...": 0.003}]
}

then we fund it
sample rpc call of funding:

{
    "jsonrpc": "1.0",
    "id": "postman",
    "method": "fundrawtransaction",
    "params": ["020000000001e093040000000000160014969611e75a87b310zcd65ba474aea0bcd4f01a2b00000000", {
            "includeWatching": false,
            "lockUnspents": false
        }]
}

considering that in the tx we want to transfer 0.003 and the only way to achieve this value is gathering both inputs in the wallet (mweb and bech32), there should 2 inputs in the transactions, right?

What we get though, after decoding the funded raw tx is something else:


{
    "result": {
        "txid": "txidexample",
        "hash": "hash",
        "version": 2,
        "size": 82,
        "vsize": 82,
        "weight": 328,
        "locktime": 0,
        "vin": [
            {
                "ismweb": false,
                "txid": "txidbech32",
                "vout": 1,
                "scriptSig": {
                    "asm": "",
                    "hex": ""
                },
                "sequence": 4294967294
            }
        ],
        "vout": [
            {
                "ismweb": false,
                "value": 0.00266974,
                "n": 0,
                "scriptPubKey": {
                    "asm": "0 asm",
                    "hex": "hex",
                    "reqSigs": 1,
                    "type": "witness_v0_keyhash",
                    "addresses": [
                        "ltc1bech32address"
                    ]
                }
            }
        ]
    },
    "error": null,
    "id": "postman"
}

by some reason, there is no error, only one input is chosen (would not it have to raise a funds error?) and instead of creating a vout with 0.003 which was the value passed on create raw transaction, it create a vout with the value of the selected input.

I used fake values to demonstrate, but this is the behavior. also it only happens if using mweb utxos in the raw tx creation

2

You need to give more details like what wallet, what network, and when exactly.
Those details help to nail the issue.