Unable to properly sign a transaction to MagicEden

[0xTechnician]

Hello, in order to buy something on MagicEden, I'm using an endpoint called buy_now that sends me back a payload with the following format :

with ['tx']['data'] the message and ['txSigned']['data'] a partially signed transaction. I'm trying to sign the message and to insert it in the first slot of signatures[] of the transaction.

Payload in entry :

{'tx': {'type': 'Buffer', 'data': [2, 1, 9, 21, 196, 1, 121, 246, 8, 50, 175, 233, 165, 26, 58, 31, 47, 169, 127, 105, 114, 246, 195, 127, 107, 150, 107, 81, 27, 242, 42, 139, 211, 125, 28, 252, 5, 127, 54, 85, 153, 40, 206, 27, 171, 173, 182, 91, 139, 93, 158, 49, 186, 39, 248, 83, 155, 236, 96, 44, 203, 26, 220, 42, 251, 159, 70, 112, 234, 229, 246, 49, 247, 171, 199, 192, 75, 0, 164, 243, 164, 173, 173, 204, 108, 103, 77, 32, 29, 248, 152, 212, 87, 233, 255, 150, 147, 163, 18, 20, 46, 102, 223, 57, 126, 136, 59, 186, 161, 206, 130, 78, 143, 99, 68, 124, 54, 187, 28, 214, 169, 184, 137, 146, 121, 188, 11, 38, 234, 75, 163, 227, 159, 245, 230, 90, 36, 4, 85, 130, 248, 34, 4, 215, 246, 88, 214, 129, 157, 51, 165, 199, 101, 224, 234, 73, 209, 32, 159, 190, 135, 97, 212, 111, 105, 68, 93, 31, 113, 62, 39, 206, 222, 140, 109, 115, 71, 173, 36, 186, 212, 191, 186, 139, 47, 118, 15, 86, 147, 62, 225, 155, 19, 124, 188, 32, 130, 24, 74, 93, 25, 73, 136, 231, 60, 239, 217, 165, 75, 201, 251, 81, 250, 184, 172, 180, 74, 170, 178, 26, 93, 235, 115, 244, 5, 241, 178, 37, 12, 158, 58, 228, 224, 183, 152, 74, 250, 18, 157, 96, 7, 160, 158, 224, 142, 150, 46, 161, 202, 218, 73, 218, 230, 18, 50, 147, 194, 191, 195, 125, 8, 175, 246, 228, 16, 89, 36, 102, 175, 155, 72, 107, 229, 118, 121, 242, 246, 139, 65, 205, 220, 49, 224, 32, 146, 119, 74, 143, 99, 98, 237, 19, 164, 241, 157, 127, 75, 73, 147, 5, 131, 61, 229, 232, 186, 71, 117, 202, 167, 81, 61, 69, 95, 107, 207, 2, 115, 207, 210, 53, 247, 102, 81, 2, 23, 197, 60, 244, 161, 168, 23, 23, 33, 75, 127, 220, 222, 157, 73, 117, 58, 207, 101, 174, 28, 121, 154, 190, 255, 161, 186, 205, 218, 172, 143, 144, 113, 213, 119, 12, 213, 213, 20, 42, 184, 68, 163, 179, 252, 28, 238, 92, 2, 7, 247, 226, 10, 211, 129, 107, 192, 1, 198, 251, 136, 30, 2, 103, 195, 27, 24, 204, 62, 20, 138, 10, 82, 147, 129, 137, 32, 237, 250, 237, 171, 57, 30, 73, 51, 108, 11, 116, 219, 102, 157, 16, 71, 3, 66, 75, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 26, 136, 115, 139, 250, 198, 10, 13, 26, 130, 255, 192, 253, 225, 104, 17, 209, 176, 195, 48, 48, 68, 144, 55, 86, 179, 38, 200, 206, 101, 253, 239, 8, 209, 122, 249, 173, 94, 22, 105, 150, 178, 108, 233, 210, 121, 80, 93, 128, 143, 222, 100, 131, 254, 248, 217, 106, 235, 99, 8, 128, 8, 203, 113, 6, 221, 246, 225, 215, 101, 161, 147, 217, 203, 225, 70, 206, 235, 121, 172, 28, 180, 133, 237, 95, 91, 55, 145, 58, 140, 245, 133, 126, 255, 0, 169, 6, 167, 213, 23, 25, 44, 92, 81, 33, 140, 201, 76, 61, 74, 241, 127, 88, 218, 238, 8, 155, 161, 253, 68, 227, 219, 217, 138, 0, 0, 0, 0, 140, 151, 37, 143, 78, 36, 137, 241, 187, 61, 16, 41, 20, 142, 13, 131, 11, 90, 19, 153, 218, 255, 16, 132, 4, 142, 123, 216, 219, 233, 248, 89, 0, 11, 227, 225, 235, 161, 122, 71, 63, 137, 176, 247, 232, 226, 73, 64, 242, 10, 235, 142, 188, 167, 26, 136, 253, 233, 93, 75, 131, 183, 26, 9, 5, 33, 159, 137, 154, 129, 212, 255, 132, 251, 89, 61, 46, 223, 138, 144, 172, 27, 58, 179, 66, 88, 247, 223, 35, 62, 165, 3, 2, 177, 189, 46, 205, 33, 64, 224, 186, 130, 65, 227, 93, 10, 193, 134, 47, 123, 19, 30, 70, 242, 146, 250, 186, 131, 119, 230, 223, 15, 6, 200, 52, 135, 241, 92, 3, 20, 6, 0, 1, 2, 8, 12, 13, 17, 242, 35, 198, 137, 82, 225, 242, 182, 255, 0, 23, 100, 7, 0, 0, 0, 0, 20, 12, 0, 1, 14, 15, 2, 8, 12, 3, 8, 16, 13, 17, 34, 102, 6, 61, 18, 1, 218, 235, 234, 255, 255, 0, 23, 100, 7, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 255, 255, 255, 255, 255, 255, 255, 255, 20, 22, 0, 4, 1, 5, 14, 15, 2, 6, 8, 12, 7, 3, 8, 9, 8, 16, 13, 18, 19, 17, 10, 11, 42, 37, 74, 217, 157, 79, 49, 35, 6, 255, 250, 0, 23, 100, 7, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]}, 'txSigned': {'type': 'Buffer', 'data': [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 30, 236, 72, 248, 210, 27, 195, 225, 195, 236, 128, 200, 183, 128, 195, 174, 10, 166, 181, 191, 241, 121, 21, 87, 232, 145, 169, 146, 168, 241, 1, 66, 204, 164, 143, 99, 121, 7, 163, 201, 176, 220, 191, 220, 99, 140, 228, 151, 111, 113, 138, 82, 86, 148, 253, 143, 194, 250, 145, 241, 152, 57, 242, 0, 2, 1, 9, 21, 196, 1, 121, 246, 8, 50, 175, 233, 165, 26, 58, 31, 47, 169, 127, 105, 114, 246, 195, 127, 107, 150, 107, 81, 27, 242, 42, 139, 211, 125, 28, 252, 5, 127, 54, 85, 153, 40, 206, 27, 171, 173, 182, 91, 139, 93, 158, 49, 186, 39, 248, 83, 155, 236, 96, 44, 203, 26, 220, 42, 251, 159, 70, 112, 234, 229, 246, 49, 247, 171, 199, 192, 75, 0, 164, 243, 164, 173, 173, 204, 108, 103, 77, 32, 29, 248, 152, 212, 87, 233, 255, 150, 147, 163, 18, 20, 8, 175, 246, 228, 16, 89, 36, 102, 175, 155, 72, 107, 229, 118, 121, 242, 246, 139, 65, 205, 220, 49, 224, 32, 146, 119, 74, 143, 99, 98, 237, 19, 46, 102, 223, 57, 126, 136, 59, 186, 161, 206, 130, 78, 143, 99, 68, 124, 54, 187, 28, 214, 169, 184, 137, 146, 121, 188, 11, 38, 234, 75, 163, 227, 159, 245, 230, 90, 36, 4, 85, 130, 248, 34, 4, 215, 246, 88, 214, 129, 157, 51, 165, 199, 101, 224, 234, 73, 209, 32, 159, 190, 135, 97, 212, 111, 105, 68, 93, 31, 113, 62, 39, 206, 222, 140, 109, 115, 71, 173, 36, 186, 212, 191, 186, 139, 47, 118, 15, 86, 147, 62, 225, 155, 19, 124, 188, 32, 130, 24, 74, 93, 25, 73, 136, 231, 60, 239, 217, 165, 75, 201, 251, 81, 250, 184, 172, 180, 74, 170, 178, 26, 93, 235, 115, 244, 5, 241, 178, 37, 12, 158, 58, 228, 224, 183, 152, 74, 250, 18, 157, 96, 7, 160, 158, 224, 142, 150, 46, 161, 202, 218, 73, 218, 230, 18, 50, 147, 194, 191, 195, 125, 164, 241, 157, 127, 75, 73, 147, 5, 131, 61, 229, 232, 186, 71, 117, 202, 167, 81, 61, 69, 95, 107, 207, 2, 115, 207, 210, 53, 247, 102, 81, 2, 23, 197, 60, 244, 161, 168, 23, 23, 33, 75, 127, 220, 222, 157, 73, 117, 58, 207, 101, 174, 28, 121, 154, 190, 255, 161, 186, 205, 218, 172, 143, 144, 113, 213, 119, 12, 213, 213, 20, 42, 184, 68, 163, 179, 252, 28, 238, 92, 2, 7, 247, 226, 10, 211, 129, 107, 192, 1, 198, 251, 136, 30, 2, 103, 195, 27, 24, 204, 62, 20, 138, 10, 82, 147, 129, 137, 32, 237, 250, 237, 171, 57, 30, 73, 51, 108, 11, 116, 219, 102, 157, 16, 71, 3, 66, 75, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 26, 136, 115, 139, 250, 198, 10, 13, 26, 130, 255, 192, 253, 225, 104, 17, 209, 176, 195, 48, 48, 68, 144, 55, 86, 179, 38, 200, 206, 101, 253, 239, 8, 209, 122, 249, 173, 94, 22, 105, 150, 178, 108, 233, 210, 121, 80, 93, 128, 143, 222, 100, 131, 254, 248, 217, 106, 235, 99, 8, 128, 8, 203, 113, 6, 221, 246, 225, 215, 101, 161, 147, 217, 203, 225, 70, 206, 235, 121, 172, 28, 180, 133, 237, 95, 91, 55, 145, 58, 140, 245, 133, 126, 255, 0, 169, 6, 167, 213, 23, 25, 44, 92, 81, 33, 140, 201, 76, 61, 74, 241, 127, 88, 218, 238, 8, 155, 161, 253, 68, 227, 219, 217, 138, 0, 0, 0, 0, 140, 151, 37, 143, 78, 36, 137, 241, 187, 61, 16, 41, 20, 142, 13, 131, 11, 90, 19, 153, 218, 255, 16, 132, 4, 142, 123, 216, 219, 233, 248, 89, 0, 11, 227, 225, 235, 161, 122, 71, 63, 137, 176, 247, 232, 226, 73, 64, 242, 10, 235, 142, 188, 167, 26, 136, 253, 233, 93, 75, 131, 183, 26, 9, 5, 33, 159, 137, 154, 129, 212, 255, 132, 251, 89, 61, 46, 223, 138, 144, 172, 27, 58, 179, 66, 88, 247, 223, 35, 62, 165, 3, 2, 177, 189, 46, 205, 33, 64, 224, 186, 130, 65, 227, 93, 10, 193, 134, 47, 123, 19, 30, 70, 242, 146, 250, 186, 131, 119, 230, 223, 15, 6, 200, 52, 135, 241, 92, 3, 20, 6, 0, 1, 2, 3, 12, 13, 17, 242, 35, 198, 137, 82, 225, 242, 182, 255, 0, 23, 100, 7, 0, 0, 0, 0, 20, 12, 0, 1, 14, 15, 2, 3, 12, 4, 3, 16, 13, 17, 34, 102, 6, 61, 18, 1, 218, 235, 234, 255, 255, 0, 23, 100, 7, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 255, 255, 255, 255, 255, 255, 255, 255, 20, 22, 0, 5, 1, 6, 14, 15, 2, 7, 3, 12, 8, 4, 3, 9, 3, 16, 13, 18, 19, 17, 10, 11, 42, 37, 74, 217, 157, 79, 49, 35, 6, 255, 250, 0, 23, 100, 7, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]}}

and here is my code :

  txSigned = tx_data['txSigned']['data']
  tx = bytes(tx_data['tx']['data'])
  client = AsyncClient("https://api.mainnet-beta.solana.com")
  payer = Keypair.from_secret_key(b58decode(mypkey))
  sig = payer.sign(tx)
  tra = Transaction.deserialize(bytes(txSigned))
  tra.signatures[0].signature = sig.signature

  tra = Transaction.serialize(tra)
  txn = await client.send_raw_transaction(tra)

I keep encountering : 'transaction has not been signed correctly'

is this a bug? thanks a lot

[crypt0miester]

let the payer sign after the transaction has been added then serialize.

tra = Transaction.deserialize(bytes(txSigned))
tra = tra.serialize()
tra.sign(payer)
txn_id = await client.send_raw_transaction(tra)

or

tra = Transaction.deserialize(bytes(txSigned))
txn_id = await client.send_transaction(tra, payer)

sorry I'm on mobile.

[0xTechnician]

With first solution :

'transaction has not been signed correctly'

With second solution :

{'code': -32602, 'message': 'invalid transaction: Transaction failed to sanitize accounts offsets correctly'}

Thank you for your help

[crypt0miester]

are you using the same keypair publickey which is requested on buy_now? or is it different?

[0xTechnician]

Same one, only publickey is required for the buy_now endpoint.

Someone had the exact same problem with c# solnet

https://github.com/bmresearch/Solnet/issues/399

[crypt0miester]

try this:

tra = Transaction.deserialize(bytes(txSigned))
tra.sign(payer)
tra = tra.serialize()
txn_id = await client.send_raw_transaction(tra)

[0xTechnician]

'bytes' object has no attribute 'recent_blockhash'

when sending transaction

[robinvangenechten17]

txSigned = tx_data['txSigned']['data'] tx = bytes(tx_data['tx']['data']) client = AsyncClient("https://api.mainnet-beta.solana.com") payer = Keypair.from_secret_key(b58decode(mypkey)) sig = payer.sign(tx) tra = Transaction.deserialize(bytes(txSigned)) txn = await client.send_raw_transaction(tra)

[robinvangenechten17]

Double signing can cause errors

[crypt0miester]

'bytes' object has no attribute 'recent_blockhash'

when sending transaction

try checking if tra.recent_blockhash is there after deserializing.

and what version of solana-py are you on?

[crypt0miester]

txSigned = tx_data['txSigned']['data'] tx = bytes(tx_data['tx']['data']) client = AsyncClient("https://api.mainnet-beta.solana.com") payer = Keypair.from_secret_key(b58decode(mypkey)) sig = payer.sign(tx) tra = Transaction.deserialize(bytes(txSigned)) txn = await client.send_raw_transaction(tra)

don't think this would work.

payer signature has to be included when transaction is being serialized, before sending raw transaction.

[0xTechnician]

Double signing can cause errors

txSigned = tx_data['txSigned']['data'] tx = bytes(tx_data['tx']['data']) client = AsyncClient("https://api.mainnet-beta.solana.com") payer = Keypair.from_secret_key(b58decode(mypkey)) sig = payer.sign(tx) tra = Transaction.deserialize(bytes(txSigned)) txn = await client.send_raw_transaction(tra)

bodiless exception (no stack trace). txn empty even after waiting

[crypt0miester]

can you post the ME api docs? I think there is something missing.

[0xTechnician]

'bytes' object has no attribute 'recent_blockhash' when sending transaction

try checking if tra.recent_blockhash is there after deserializing.

and what version of solana-py are you on?

Now there is something in recent_blockhash (with this solution). "GLau6pmJYokXk6gMD6AGRaY8yKx6p3HpkccL7ux7VniK"

and error is now : {'code': -32602, 'message': 'invalid transaction: Transaction failed to sanitize accounts offsets correctly'}

my solana-py version is 0.23.1

thanks again

[0xTechnician]

can you post the ME api docs? I think there is something missing.

https://api.magiceden.dev/ here is the API doc. Endpoint i'm using is /buy_now. I have a Bearer token.

[0xTechnician]

'bytes' object has no attribute 'recent_blockhash' when sending transaction

try checking if tra.recent_blockhash is there after deserializing. and what version of solana-py are you on?

Now there is something in recent_blockhash (with this solution). "GLau6pmJYokXk6gMD6AGRaY8yKx6p3HpkccL7ux7VniK"

and error is now : {'code': -32602, 'message': 'invalid transaction: Transaction failed to sanitize accounts offsets correctly'}

my solana-py version is 0.23.1

thanks again

I believe that is error is due to multi signing. As mentionned above, someone overcame this problem by editing the bytes of the txSigned with the signature of the message

(https://github.com/bmresearch/Solnet/issues/399)

[robinvangenechten17]

txSigned = tx_data['txSigned']['data'] tx = bytes(tx_data['tx']['data']) client = AsyncClient("https://api.mainnet-beta.solana.com/") payer = Keypair.from_secret_key(b58decode(mypkey)) sig = payer.sign(tx) tra = Transaction.serialize(bytes(txSigned)) txn = await client.send_raw_transaction(tra)

[robinvangenechten17]

Damn didnt see it was deserialize, u need to serialize and to send_raw_transaction. This should work

[0xTechnician]

txSigned = tx_data['txSigned']['data'] tx = bytes(tx_data['tx']['data']) client = AsyncClient("https://api.mainnet-beta.solana.com/") payer = Keypair.from_secret_key(b58decode(mypkey)) sig = payer.sign(tx) tra = Transaction.serialize(bytes(txSigned)) txn = await client.send_raw_transaction(tra)

'bytes' object has no attribute 'signatures'

[crypt0miester]

'bytes' object has no attribute 'recent_blockhash' when sending transaction

try checking if tra.recent_blockhash is there after deserializing. and what version of solana-py are you on?

Now there is something in recent_blockhash (with this solution). "GLau6pmJYokXk6gMD6AGRaY8yKx6p3HpkccL7ux7VniK"

and error is now : {'code': -32602, 'message': 'invalid transaction: Transaction failed to sanitize accounts offsets correctly'}

my solana-py version is 0.23.1

thanks again

I believe that is error is due to multi signing. As mentionned above, someone overcame this problem by editing the bytes of the txSigned with the signature of the message

(https://github.com/bmresearch/Solnet/issues/399)

yeah, saw it.

I'll try to reproduce the txn.

meanwhile please update to latest solana-py and retry.

print the transaction before serializing. it would show you the whole transaction. perhaps you would find the problem from there.

[robinvangenechten17]

txSigned = tx_data['txSigned']['data'] tx = bytes(tx_data['tx']['data']) client = AsyncClient("https://api.mainnet-beta.solana.com/") payer = Keypair.from_secret_key(b58decode(mypkey)) sig = payer.sign(tx) tra = Transaction.deserialize(bytes(txSigned)) txn = await client.send_raw_transaction(tra.serialize())

[robinvangenechten17]

Sorry this is what I meant

[0xTechnician]

txSigned = tx_data['txSigned']['data'] tx = bytes(tx_data['tx']['data']) client = AsyncClient("https://api.mainnet-beta.solana.com/") payer = Keypair.from_secret_key(b58decode(mypkey)) sig = payer.sign(tx) tra = Transaction.deserialize(bytes(txSigned)) txn = await client.send_raw_transaction(tra.serialize())

"transaction has not been signed correctly"

thanks a lot for your answers

[robinvangenechten17]

Update solana

[crypt0miester]

the transaction is a whole mess mate. I'm sorry but it will take more than a few hours for me to actually provide a solution.

the good news is that it can be done. good luck.

do note that before the buy_now you will have to deposit the buy price into escrow.

[robinvangenechten17]

Instead of signing with the payer use transaction.sign(payer)

[0xTechnician]

Instead of signing with the payer use transaction.sign(payer)

yeah, nothing works. In the issue I linked above, the solution was to sign the ['tx']['data'] with the payer and to put the signature in the [0,0,0,0,0,0,0,0....] sequence in the txSigned byte array. Then to send transaction.

[C-o-d-e-C-o-w-b-o-y]

Hey @0xTechnician

txSigned is a partially signed transaction, I'm not sure what the equivalent in Python is, but here is my JavaScript code that works:

Does it make sense? You shouldn't be unpacking the transaction or using tx at all, only sign txSigned (which is partial signed already), and then send the transaction

Maybe something like this would work? (again I dont know the python equivalents to the web3 lib soz)

txSigned = tx_data['txSigned']['data']
client = AsyncClient("https://api.mainnet-beta.solana.com")
payer = Keypair.from_secret_key(b58decode(mypkey))
payer.sign(txSigned)
tra = Transaction.serialize(tra)
txn = await client.send_raw_transaction(tra)

[kasahh]

Hey @0xTechnician

txSigned is a partially signed transaction, I'm not sure what the equivalent in Python is, but here is my JavaScript code that works:

Does it make sense? You shouldn't be unpacking the transaction or using tx at all, only sign txSigned (which is partial signed already), and then send the transaction

Maybe something like this would work? (again I dont know the python equivalents to the web3 lib soz)

txSigned = tx_data['txSigned']['data']
client = AsyncClient("https://api.mainnet-beta.solana.com")
payer = Keypair.from_secret_key(b58decode(mypkey))
payer.sign(txSigned)
tra = Transaction.serialize(tra)
txn = await client.send_raw_transaction(tra)

did this work for you? @0xTechnician

[0xTechnician]

Hey @0xTechnician txSigned is a partially signed transaction, I'm not sure what the equivalent in Python is, but here is my JavaScript code that works:

Does it make sense? You shouldn't be unpacking the transaction or using tx at all, only sign txSigned (which is partial signed already), and then send the transaction Maybe something like this would work? (again I dont know the python equivalents to the web3 lib soz)

txSigned = tx_data['txSigned']['data']
client = AsyncClient("https://api.mainnet-beta.solana.com")
payer = Keypair.from_secret_key(b58decode(mypkey))
payer.sign(txSigned)
tra = Transaction.serialize(tra)
txn = await client.send_raw_transaction(tra)

did this work for you? @0xTechnician

No it didnt

[SocialT]

Hey @0xTechnician txSigned is a partially signed transaction, I'm not sure what the equivalent in Python is, but here is my JavaScript code that works:

Does it make sense? You shouldn't be unpacking the transaction or using tx at all, only sign txSigned (which is partial signed already), and then send the transaction Maybe something like this would work? (again I dont know the python equivalents to the web3 lib soz)

txSigned = tx_data['txSigned']['data']
client = AsyncClient("https://api.mainnet-beta.solana.com")
payer = Keypair.from_secret_key(b58decode(mypkey))
payer.sign(txSigned)
tra = Transaction.serialize(tra)
txn = await client.send_raw_transaction(tra)

did this work for you? @0xTechnician

No it didnt

I succeeded after a lot of effort I can share in exchange for 3 sol socialmm#4049

[Jacobfinn123]

Hey @0xTechnician txSigned is a partially signed transaction, I'm not sure what the equivalent in Python is, but here is my JavaScript code that works:

Does it make sense? You shouldn't be unpacking the transaction or using tx at all, only sign txSigned (which is partial signed already), and then send the transaction Maybe something like this would work? (again I dont know the python equivalents to the web3 lib soz)

txSigned = tx_data['txSigned']['data']
client = AsyncClient("https://api.mainnet-beta.solana.com")
payer = Keypair.from_secret_key(b58decode(mypkey))
payer.sign(txSigned)
tra = Transaction.serialize(tra)
txn = await client.send_raw_transaction(tra)

did this work for you? @0xTechnician

No it didnt

Did you ever find a solution for this? Previously, before the signing, I was able to populate a transaction with a message but now not able to get it working.

[0xTechnician]

Still not able to do it!