MultiChain Developer Q&A - Recent questions tagged signrawtransaction

sending or issuing asset as P2SH

Tue, 19 Nov 2019 10:48:34 +0000

Dear tech team,

i'm working on a MVP using multichain using fully compatible bitcoin parameter. Everything is working fine.
Now I'd like to use an external hw wallet to sign a transaction like issuing or sending an asset. The main problem is that my hw wallet (i'm using a Nano S Ledger) can only sign standard transaction (without OP_DROP and OP_RETURN). I can think to use libcoinj with the Transactionbuilder class but in the process I have to sign the transaction with ecda and my wallet doesn't allow to sign any raw hash string.

So in the end I'm thinking to find a different approack using a P2SH script in the following way:

- define issuing or sending script as a P2SH in MC
- create a transaction to pay P2SH address in MC
- external sign the transaction with my hw wallet
- sending the signed transaction in MC

What do you think about it?

Can you give me some hints?

Thanks
Fabio

Any advice for signing raw tx?

Mon, 09 Sep 2019 22:59:53 +0000

Hello all,

I am working through the examples for working with raw transactions. I'm using createRawSendFrom + signRawTransaction to send a native asset, but I'm missing something. signRawTransaction appears to return the original TX, unmodified.

The addresses I am sending to & from are both in the wallet
to has receive, from has send permission
from address has sufficient funds
the selected output for vin has enough assets

Following are JSON formatted results of the operations & a couple queries I tried to sanity check. I'm using v2.0.2 running in a docker container; I'm using the multichain-node RPC client to make calls.

Any ideas re: where to dig next are appreciated. Thanks!

-Tom

createRawSendFrom:

{
"txid": "eb138f65008f82191416140ada138a7c8b77fe775cd79c873b67e794d1abcd34",
"vin": [
{
"txid": "51db4266eca9e7083057c608dfe2f731cf865cdbecf6845ffe7a538440756fc7",
"vout": 0,
"scriptSig": {
"asm": "",
"hex": ""
}
}
],
"vout": [
{
"value": 5,
"n": 0,
"scriptPubKey": {
"asm": "OP_DUP OP_HASH160 5f0e32e41487fd8bacfd2625b66593bd86a619d6 OP_EQUALVERIFY OP_CHECKSIG",
"hex": "76a9145f0e32e41487fd8bacfd2625b66593bd86a619d688ac",
"reqSigs": 1,
"type": "pubkeyhash",
"addresses": [
"1Dr8yVKr8wizJF6t3kF65qJctTN7uQxXsrwhFE"
]
}
},
{
"value": 94.769,
"n": 1,
"scriptPubKey": {
"asm": "OP_DUP OP_HASH160 b535f52040ec5b85670c41bf354578eed6acefe7 OP_EQUALVERIFY OP_CHECKSIG",
"hex": "76a914b535f52040ec5b85670c41bf354578eed6acefe788ac",
"reqSigs": 1,
"type": "pubkeyhash",
"addresses": [
"1RVWQ3v8n6ffRWh4Ve9eRNZDdDZmbDq27uSSRW"
]
}
}
]
}

listaddresses
"address": "1RVWQ3v8n6ffRWh4Ve9eRNZDdDZmbDq27uSSRW",
"ismine": true

"address": "1Dr8yVKr8wizJF6t3kF65qJctTN7uQxXsrwhFE",
"ismine": true

vin[0]

{
"txid": "51db4266eca9e7083057c608dfe2f731cf865cdbecf6845ffe7a538440756fc7",

"vout": [
{
"value": 100,
"n": 0,
"scriptPubKey": {
"asm": "OP_DUP OP_HASH160 b535f52040ec5b85670c41bf354578eed6acefe7 OP_EQUALVERIFY OP_CHECKSIG",
"hex": "76a914b535f52040ec5b85670c41bf354578eed6acefe788ac",
"reqSigs": 1,
"type": "pubkeyhash",
"addresses": [
"1RVWQ3v8n6ffRWh4Ve9eRNZDdDZmbDq27uSSRW"
]
}
}
]
}

signRawTransaction

{
"hex": "0100000001c76f754084537afe5f84f6ecdb5c86cf31f7e2df08c6573008e7a9ec6642db510000000000ffffffff0288130000000000001976a9145f0e32e41487fd8bacfd2625b66593bd86a619d688ac31720100000000001976a914b535f52040ec5b85670c41bf354578eed6acefe788ac00000000",
"complete": false,
}

How to create a sign from external function?

Mon, 13 May 2019 03:03:52 +0000

Hi Multichain QnA,
Is there anyway (Mathematical functions) using which I can sign the transaction personally (and create the 'longer-hex-blob'), as I will be using My Private Key which can be vulnerable at times while sending on the Internet?

In short, How is the "longer-hex-blob" created from "signrawtransaction [paste-hex-blob] '[]' '["Priv-Key=1"]'"?

Not able to complete signing of transaction for Multisignature address

Tue, 26 Mar 2019 10:44:24 +0000

Created 2 addresses using createkeypairs :

Address 1: { "address" : "1SxbigBX5yi7CAxXaPqQdcawbfWHPRWHGpVETN",

        "privkey" : "V8MZV1BLv3o1RbkzAj7M1j2mYZf2DC6h14T517HW7jE66MqJrePvWM6T"    }

Address 2 :     { "address" : "1cwJE98kdMfoYSSnhSVPoxGb1xJqLG9QgRMWh",

        "privkey" : "V9rApqjqNpZstuL59vesDxYHFdWJTz4xqz5AEye7VYCtgY5qmfQhFtnD"}

Using the above addresses I was also able to create 1 Multi-sig account
Multisig Address :
    {
        "address" : "44gMSB3z4qw4WHDhHa2pgEqbbFqywH57AUnKDY",
        "ismine" : false,
        "iswatchonly" : true,
        "isscript" : true,
        "script" : "multisig",
        "hex" : "5221037eb7f908e67f60b4b38f2a5254690351d74619f69d53b2fe5af53ac4171bea1e2102f3d385cbe481c0813393286d00e8a7861d6d07f4e0ed7373b13f0d1acb6c691a52ae",
        "addresses" : [
            "1SxbigBX5yi7CAxXaPqQdcawbfWHPRWHGpVETN",
            "1cwJE98kdMfoYSSnhSVPoxGb1xJqLG9QgRMWh"
        ],
        "sigsrequired" : 2,
        "account" : "",
        "synchronized" : false,
        "startblock" : 203
    }

I loaded some assets to Multisig address "44gMSB3z4qw4WHDhHa2pgEqbbFqywH57AUnKDY"
        "name" : "USD",
        "qty" : 150

After referring to
1. https://www.multichain.com/qa/833/multiple-multisig-address-different-addresses-same-wallet

2. https://www.multichain.com/qa/6028/transactions-multisig-explicitly-using-addresses-privkeys?show=6055#a6055
3.https://www.multichain.com/qa/5941/random-previous-output-scriptpubkey-mismatch-error?show=5983#c5983
4. https://www.multichain.com/developers/multisignature-transactions/

5. https://www.multichain.com/developers/external-key-management/

I was able to do
COMMAND 1:
createrawsendfrom 44gMSB3z4qw4WHDhHa2pgEqbbFqywH57AUnKDY '{"1UeHUhZ5bqyoLRKnaseerQZJEajgAQhYiWSaTN":{"USD":100}}'

RESPONSE:
FIRST-HEX-BLOB

COMMAND 2:

decoderawtransaction FIRST-HEX-BLOB

RESPONSE:

{
    "txid" : "f9f5f34bafb1872c636e4a0f4bdb8e87f0ec9566f060a49b2aee1454f13ef6c3",
    "version" : 1,
    "locktime" : 0,
    "vin" : [
        {
            "txid" : "ae03b2126cb31254a4f49324c2bf07d75ec911bb85788e7914e46de83df053a1",
            "vout" : 0,
            "scriptSig" : {
                "asm" : "",
                "hex" : ""
            },
            "sequence" : 4294967295
        }
    ],
    "vout" : [
        {
            "value" : 0,
            "n" : 0,
            "scriptPubKey" : {
                "asm" : "OP_DUP OP_HASH160 cc86f94dfe7d496036d0b95f67498990e7c35339 OP_EQUALVERIFY OP_CHECKSIG 73706b718c19495c2f875d848174192401260d3a1027000000000000 OP_DROP",
                "hex" : "76a914cc86f94dfe7d496036d0b95f67498990e7c3533988ac1c73706b718c19495c2f875d848174192401260d3a102700000000000075",
                "reqSigs" : 1,
                "type" : "pubkeyhash",
                "addresses" : [
                    "1UeHUhZ5bqyoLRKnaseerQZJEajgAQhYiWSaTN"
                ]
            },
            "assets" : [
                {
                    "name" : "USD",
                    "issuetxid" : "3a0d260124197481845d872f5c49198ca7e23f4ab7a6f56a4bb66af0597e9d1d",
                    "assetref" : "77-265-3386",
                    "qty" : 100,
                    "raw" : 10000,
                    "type" : "transfer"
                }
            ]
        },
        {
            "value" : 0,
            "n" : 1,
            "scriptPubKey" : {
                "asm" : "OP_HASH160 22a14405491d1981d08816b0a9465ba444ab2090 OP_EQUAL 73706b718c19495c2f875d848174192401260d3a8813000000000000 OP_DROP",
                "hex" : "a91422a14405491d1981d08816b0a9465ba444ab2090871c73706b718c19495c2f875d848174192401260d3a881300000000000075",
                "reqSigs" : 1,
                "type" : "scripthash",
                "addresses" : [
                    "44gMSB3z4qw4WHDhHa2pgEqbbFqywH57AUnKDY"
                ]
            },
            "assets" : [
                {
                    "name" : "USD",
                    "issuetxid" : "3a0d260124197481845d872f5c49198ca7e23f4ab7a6f56a4bb66af0597e9d1d",
                    "assetref" : "77-265-3386",
                    "qty" : 50,
                    "raw" : 5000,
                    "type" : "transfer"
                }
            ]
        }
    ]
}

COMMAND 3:

signrawtransaction FIRST-HEX-BLOB '[{"txid":"ae03b2126cb31254a4f49324c2bf07d75ec911bb85788e7914e46de83df053a1","vout":0,"scriptPubKey":"a91422a14405491d1981d08816b0a9465ba444ab2090871c73706b718c19495c2f875d848174192401260d3a983a00000000000075","redeemScript":"5221037eb7f908e67f60b4b38f2a5254690351d74619f69d53b2fe5af53ac4171bea1e2102f3d385cbe481c0813393286d00e8a7861d6d07f4e0ed7373b13f0d1acb6c691a52ae"}]' '["V9rApqjqNpZstuL59vesDxYHFdWJTz4xqz5AEye7VYCtgY5qmfQhFtnD","V9rApqjqNpZstuL59vesDxYHFdWJTz4xqz5AEye7VYCtgY5qmfQhFtnD"]'

Response:
{
    "hex" : SECOND-HEX-BLOB , "complete" : false
}

COMMAND 4:
signrawtransaction SECOND-HEX-BLOB '[{"txid":"ae03b2126cb31254a4f49324c2bf07d75ec911bb85788e7914e46de83df053a1","vout":0,"scriptPubKey":"a91422a14405491d1981d08816b0a9465ba444ab2090871c73706b718c19495c2f875d848174192401260d3a983a00000000000075","redeemScript":"5221037eb7f908e67f60b4b38f2a5254690351d74619f69d53b2fe5af53ac4171bea1e2102f3d385cbe481c0813393286d00e8a7861d6d07f4e0ed7373b13f0d1acb6c691a52ae"}]' '["V9rApqjqNpZstuL59vesDxYHFdWJTz4xqz5AEye7VYCtgY5qmfQhFtnD","V9rApqjqNpZstuL59vesDxYHFdWJTz4xqz5AEye7VYCtgY5qmfQhFtnD"]'
Response:
{
    "hex" : "SECOND-HEX-BLOB ",
    "complete" : false
}

So Even after completing the Multisig addresses sending the assets The transaction is not getting completed. Hence, the wallet balance is the same.

Please Let me know the reason for the problem. And the solution as well.
Note: The second hex-blob is bigger thank the first.

how to make a user enter the passphrase before signing any transaction?

Mon, 10 Dec 2018 08:35:59 +0000

Is it possible to ask user to enter the passphrase before signing a transaction on the network ?

Is it possible to make a "joint transaction"?

Thu, 15 Nov 2018 20:31:48 +0000

Hello,

Is it possible to make a "joint transaction"?

Consider this scenario:

on a blockchain there is an asset called asset1
there is a total of 1500 units of asset1
A owns 1000 units of asset1
B owns 500 units of asset1
both A and B say they want to send their part of asset1 to C

I desire a single transaction signed by both A and B. I tried createrawtransaction and appendrawtransaction, but I get ‘16: ConnectInputs failed’.
To get inputs I used gettxout <issue_txid_1> 0 and gettxout <issue_txid_2> 0 which show me the correct quantities of said asset.

The asset has just been issued in aforementioned quantities, to 2 different addresses (A and B).

Am I doing something wrong?

Thank you very much.

Create transactions at the same time

Mon, 05 Nov 2018 09:10:24 +0000

Dear Admin,

I created 2 transaction from a wallet address with function: "createrawsendfrom". After, I used private key to sign the tow transactions. When I sent the transactions, I only send a transaction successful and a transaction is fail.

I get an error:

Error code: -26

Message:18: Bad-txns-inputs-spent

So, Can you please help me to create transactions from a wallet address at the same time?

thanks so much.

signRawTransaction is not signining

Mon, 28 May 2018 08:57:33 +0000

I have 2 of 2 multisig address and the private key of those address stored in wallet. i have created an asset using that multisig address.

now i want to issue the asset from multisig address to other address but using raw transaction.

here i want two different person(belongs to multisig address) to sign it separately on their own.

so i performed following step-

createrawsendfrom 4GUoGwLmqG6BeTE8dx2DWTWCqKbrCfN7uYtypF '{"1PpwB7YosnV3p9nqqn9Uoic4C3aC8KCfkS84am":{"asset9":500}}' '[]' ''

i get hex from the first operation

signrawtransaction hex [privateKey1]

signrawtransaction hex [privateKey2]

i am getting {hex:'some random hex',complete:false}

why i am getting {complete:false} everytime i sign ?

Create a raw transaction

Tue, 13 Mar 2018 16:38:57 +0000

Hi,

I have three multichain nodes i.e. Supplier , OEM and Customer . Supplier is the admin node and the other two nodes are child nodes i.e. OEM and Customer are pointing to the admin or seed node i.e. Supplier.

So I want to transfer an asset from Supplier to the OEM . Supplier has an asset called "compact CD" and OEM has an asset called "Finished Good CD". Now I want to transfer some units of asset from Supplier to OEM .

For this I am creating a raw transaction. So my Node JS API is making a POST Request Call and method is checking :

1. PrepareLockUnspent for that Entity and assetInfo.

2. Creating a raw transaction

3. But if Setp 2 is success then I am signing a transaction .

So the issue which i am facing is :

What should be the Request Object for this approach or Is there any approach which we can try on the command prompt itself using some set of commands of multichain so as to create a raw transaction?

Multichains and everything other is running on Windows OS :: Please note this !!

If I can get a JSON Request object with some hardcoded values then It would be of great help !!

hex-data getting compressed or shortened

Fri, 16 Feb 2018 18:29:10 +0000

I am storing data on stream using external key...

createrawsendfrom / signrawtransaction / sendrawtransaction...one of these commands is shortening the hex-data i provided which in turn is ruining my encrypted data because when i try to decrypt it the data is not getting displayed.

do you have any idea on how to retrieve iex-data exactly the same? or is there any other issue?

How do I sign a raw transaction using Javascript or Any Javascript Library?

Mon, 29 Jan 2018 09:02:59 +0000

# multichain

I have created a raw transaction using mutlichain-cli. This is that raw transaction.

Raw-Transaction

Now I have signed this using bitcoin-js library. I have also set following params so that bitcoin addresses are compatible here.

"address-pubkeyhash-version" : "00",
"address-scripthash-version" : "05",
"private-key-version" : "80",
"address-checksum-value" : "00000000",

This is the signed transaction using bitcoinjs library.

Signed-Transaction

When I convert this transaction to hex and submit to chain, it says Script failed an OP_CHECKSIGVERIFY operation. I feel that scriptSig generated by bitcoinjs library is wrong.

How do I generate correct signatures using any javascript module?

Raw transaction using node js

Sat, 26 Aug 2017 22:29:58 +0000

Hi I'm using multichain-node to build a web interface, Im trying to create a raw transaction, this is my code:

multichain.createRawTransaction({from: "an address", to: "anotheraddress". "kchinTest", qty: amount}, (err, rawTransaction)=>{
        if(err){
          throw err;
        }
        console.log(rawTransaction);
      })

Using pybitcoin tools to sign transactions offline

Mon, 21 Aug 2017 19:35:00 +0000

I'm having trouble using pybitcoin tools to sign transactions offline : https://github.com/vbuterin/pybitcointools

I'm using multichain-cli to create the raw transaction:

1) createrawtransaction '[{"txid":"f098143b389bf7ff19c26d8d051ac4351f255cdb1f41735cf4fa723b9e38893","vout":0}]' '{}'

Output: 01000000019388e3b923a74fcf3517f4b1cd54251f35c41a058d6dc219fff79b383b1498f00000000000ffffffff0000000000

2) appendrawdata 01000000019388e3b923a74fcf3517f4b1cd54251f35c41a058d6dc219fff79b383b1498f00000000000ffffffff0000000000 5554584f732046545721

Output: 01000000019388e3b923a74fcf3517f4b1cd54251f35c41a058d6dc219fff79b383b1498f00000000000ffffffff0100000000000000000c6a0a5554584f73204654572100000000

3) And then using pybitcoin tools...

tx = \
'01000000019388e3b923a74fcf3517f4b1cd54251f35c41a058d6dc219fff79b383b1498f00000000000ffffffff0100000000000000000c6a0a5554584f73204654572100000000'

signed_tx = sign(tx, 0, 'c19baef3f8c7cd8df7aab108ef8578dd6694fed976c85cd8213cdaec3d7e4ebd')

4) When calling sendrawtransaction using the hex result from signing in step 3, I get the following error.

error code: -26
error message:
16: ConnectInputs failed

Any advice??

Proven library for signing a multi chain transaction

Mon, 10 Jul 2017 18:15:26 +0000

Thanks for that......makes sense. On a related topic, have you tested any of the bitcoin libraries to sign a multi chain raw transaction. We are currently using bitcoin.js as we use that for BTC, and so far we just haven't been able to get it to successfully sign a transaction??

If you have any examples using external libraries, that would be very helpful!!

Cheers

Marty

Signing raw transaction using bitcore-lib

Thu, 18 May 2017 15:06:43 +0000

Guys do you know if it's possible to sign a multichain raw transaction with bitcore-lib or other bitcoin compatible library?

Wondering if the inclusion of custom asset names in the outputs will upset the bitcoin libraries or not before I start investigating this?

Cheers

Marty

Sign a raw transaction manually

Fri, 05 May 2017 07:07:16 +0000

Hi!

Thank you for your work! I have successfully been using the multichain for building the distributed data storage based on streams.It's time to add the functionality of the assets and the wallets.The main condition is the sign raw transaction on the client side. I have read that multichain compatible this bitcoin and can use some client library to do this. Last week I'm trying to implement the functionality of the signature, but I can't do it.

The sequence of actions is as follows:

- I created wallets addresses and made import them by importaddress

- createrawsendfrom via RPC call

For javascript i have tried to use bitcoinjs library - for import unsigned transaction and sign it. But result is internal excaption.

For C# i have tried to use NBitcoin. Nothing new. Internal exception. As well as for php this BitWasp.

Finally i can tried to use this solution from this question http://www.multichain.com/qa/1923/manually-sign-a-raw-transaction. I left comments that I did not get the same signature as on the server.

Can you help me to understand what am I doing wrong? I hope for your help.

Thanks!

Create raw transaction to publish data to a stream offline

Thu, 26 Jan 2017 08:46:16 +0000

Hi.

Is it possible to create an offline signed raw transaction that publishes data onto a stream?

Or do you need some knowlede of the blockchain ledger like inputs and outputs that you can not know offline?

The idea would be that a client (device) is able to prepare a transaction that publishs data to the blockchain. The device should own the private key locally.

This also raises the question if there are convenient libraries for creating and signing raw transactions.

Thanks,

Alex

signrawtransaction returns "Invalid private key"

Wed, 09 Nov 2016 01:38:00 +0000

Hello!

I've been testing for a couple of days now, and I don't get to sign a raw transaction. These are the steps I follow:

1. createrawtransaction spending some amount of an asset from an unspent transaction

2. signrawtransaction "xxx" '[]' '["base58"]'

I get:

error code: -5
error message:
Invalid private key

I have read in bitcoin documentation that the private key must be a base58-encoded string, so I encoded the 64 hexadecimal digits key, but still the same error.

Can you help me with this error? Thank you.

Unable to sendrawtransaction after signrawtransaction

Mon, 08 Aug 2016 15:57:15 +0000

I m signing a raw transaction and getting object like this:

{

"hex":"some string",

"complete":true

}

then I m sending this using--- sendrawtransaction "hex"

I m getting error every time:

error code: -26
error message:
64: One of the outputs doesn't have receive permission

Can you tell me what am I doing wrong??

Sign raw transaction

Sun, 26 Jun 2016 20:38:05 +0000

Could you provide a breakdown of how to sign a simple raw transaction similar to how you did for the multichain Address format?

I'm double hashing the raw transaction hex string and signing it with my private key. The result looks similar but is marginally different from the one which I get when using "signrawtransaction".

Manually sign a raw transaction

Wed, 01 Jun 2016 08:16:38 +0000

Hi, i'm trying to create a node library that can handle addresses for a Multichain blockchain (node/browser wallet). Generating the addresses works, but now i also want to handle signing inside this library.

For this i only want the actual signing to happen inside the library, so the node can create the raw transaction but i don't want to give my private key to the node ... so signing the raw transaction should happen locally (in the library). Is there any documentation on how to sign a raw transaction? Where are the differences compared to signing a raw transaction for the bitcoin blockchain (because this also takes the network into account)?

kind regards,

Daan

Clarification on signrawtransaction

Fri, 18 Mar 2016 15:39:10 +0000

I have been looking at using the create/sign/send raw transaction commands and have hit an issue with the signrawtransaction call. I have the hex from from initial createrawtransaction and my expectation was I could then sign this with my private key (that is not within the wallet). Looking at the help it looks like I need to re-submit quite a few attributes pertaining to the transaction that were used in the createrawtrnsaction, see below?

signrawtransaction "hexstring" ( [{"txid":"id","vout":n,"scriptPubKey":"hex","redeemScript":"hex"},...] ["privatekey1",...] sighashtype )

Have I got this right? If so, why is that and do you have a concrete example of how to source all the data elements to get the transaction successfully signed?

Many Thanks

Marty

signrawtransactions

Wed, 09 Mar 2016 19:16:51 +0000

what is significance of "signrawtransactions" ?

what is difference between following orders.

singrawtransaction->sendrawtransaction
and createrawtransaction->sendrawtransaction ?

Unable to sendrawtransaction

Mon, 28 Dec 2015 19:06:14 +0000

I'm creating a raw transaction the following way.

multichain-cli chain1 createrawtransaction '[{"txid":"1aa04efdf2b5d4b7b1832e124dc9c9c13b35bee764083166beb7d75c1e57a5ce","vout":0}]' '{"1Hkkz3pCNNHcvMsC9gqjFyE33B1EiVFqjVrT7g":{"asset1":2.0}}'

returns tx hexstring

multichain-cli chain1 signrawtransaction [ tx hexstring]

multichain-cli chain1 sendrawtransaction [ tx hexstring]

{"method":"sendrawtransaction","params":["0100000001cea5571e5cd7b7be66310864e7be353bc1c9c94d122e83b1b7d4b5f2fd4ea01a0000000000ffffffff0100000000000000003176a9147bf707c2e0523276d2f5045c97ed8a04f69b438088ac1673706b71640000000a0100001709c8000000000000007500000000"],"id":1,"chain_name":"

chain1"}

I get error: {"code":-26,"message":"64: Nonstandard transaction input"}

I can't find what the problem is here. The txID i'm using as input for this new transaction is just a normal transaction of asset1 between 2 wallets. Any ideas on why this might be happening?

Thanks!