ConnectInputs Error when writing to stream using raw transaction

Question

Hi,

We are encountering the following error during a sendrawtransaction call:

ConnectInputs failed: mandatory-script-verify-flag-failed (Script failed an OP_CHECKSIGVERIFY operation)

We are signing the rawtx off-node using Javascript. It seems to happen for a particular from-address only. Other addresses don't encounter the same issue.

The transaction being sent involves writing to a stream. Sample decoded raw tx that encounters this issue:

{
            "data": [
                "7b2266726f6d5f61646472657373223a22313633665047556e7a3739624d675555636a537a6e6b68754a67397970664c357653222c22746f5f61646472657373223a2231467a675554575739456169764e3632396b43694b33646a5a69457376324a4b5944222c227061796c6f6164223a22353236663739323737333230373436353733373432303664363537333733363136373635222c226578706972795f64617465223a22222c226b657973223a7b7d7d"
            ],
            "locktime": 0,
            "txid": "f47a7bd5e32e49b24fd8faf364a81e1ea34b8f5524204810eb7989a84f19b2ec",
            "version": 1,
            "vin": [
                {
                    "scriptSig": {
                        "asm": "",
                        "hex": ""
                    },
                    "sequence": 4294967295,
                    "txid": "38edc8652a9685c6448a0017b843718b6b8c9ee1d17a4b663224e31510d34b60",
                    "vout": 0
                }
            ],
            "vout": [
                {
                    "assets": [],
                    "items": [
                        {
                            "createtxid": "72e857455a4a3ea43ed1920080130f811514b756439abd8d348dfbf7c4ebd178",
                            "data": "7b2266726f6d5f61646472657373223a22313633665047556e7a3739624d675555636a537a6e6b68754a67397970664c357653222c22746f5f61646472657373223a2231467a675554575739456169764e3632396b43694b33646a5a69457376324a4b5944222c227061796c6f6164223a22353236663739323737333230373436353733373432303664363537333733363136373635222c226578706972795f64617465223a22222c226b657973223a7b7d7d",
                            "key": "1FzgUTWW9EaivN629kCiK3djZiEsv2JKYD",
                            "name": "sharedtxns",
                            "publishers": [],
                            "streamref": "3-1195-59506",
                            "type": "stream"
                        }
                    ],
                    "n": 0,
                    "permissions": [],
                    "scriptPubKey": {
                        "asm": "73706b65810f13800092d13ea43e4a5a4557e872 OP_DROP 73706b6b31467a675554575739456169764e3632396b43694b33646a5a69457376324a4b5944 OP_DROP OP_RETURN 7b2266726f6d5f61646472657373223a22313633665047556e7a3739624d675555636a537a6e6b68754a67397970664c357653222c22746f5f61646472657373223a2231467a675554575739456169764e3632396b43694b33646a5a69457376324a4b5944222c227061796c6f6164223a22353236663739323737333230373436353733373432303664363537333733363136373635222c226578706972795f64617465223a22222c226b657973223a7b7d7d",
                        "hex": "1473706b65810f13800092d13ea43e4a5a4557e872752673706b6b31467a675554575739456169764e3632396b43694b33646a5a69457376324a4b5944756a4cb37b2266726f6d5f61646472657373223a22313633665047556e7a3739624d675555636a537a6e6b68754a67397970664c357653222c22746f5f61646472657373223a2231467a675554575739456169764e3632396b43694b33646a5a69457376324a4b5944222c227061796c6f6164223a22353236663739323737333230373436353733373432303664363537333733363136373635222c226578706972795f64617465223a22222c226b657973223a7b7d7d",
                        "type": "nulldata"
                    },
                    "value": 0
                },
                {
                    "assets": [],
                    "items": [],
                    "n": 1,
                    "permissions": [],
                    "scriptPubKey": {
                        "addresses": [
                            "163fPGUnz79bMgUUcjSznkhuJg9ypfL5vS"
                        ],
                        "asm": "OP_DUP OP_HASH160 3759808ad53db7f3801a04923ce265ffde036fe0 OP_EQUALVERIFY OP_CHECKSIG",
                        "hex": "76a9143759808ad53db7f3801a04923ce265ffde036fe088ac",
                        "reqSigs": 1,
                        "type": "pubkeyhash"
                    },
                    "value": 0
                }
            ]
        }

Any advice on what we should be looking into?

Answer 1

There are various possibilities here. May I suggest also using MultiChain to sign the problematic transaction (using signrawtransaction and passing in the private key) and comparing the two signatures?

You also might want to take a look at multichaind-cold which can perform external signing for you:

https://www.multichain.com/developers/cold-nodes-wallets/