I can provide PHP code example of that you are doing.

Typical transfer transaction as json: https://github.com/deemru/WavesKit/blob/7c3e536a8f8c9591e4738028aaea5735d14c1d08/src/WavesKit.php#L1780-L1798

And as bytes: https://github.com/deemru/WavesKit/blob/7c3e536a8f8c9591e4738028aaea5735d14c1d08/src/WavesKit.php#L2310-L2323

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Where do you get such fields? attachmentLen? attachmentBytes?

Take any valid transfer as a reference, for example: http://nodes.wavesnodes.com/transactions/info/3XFDy1BDWW3FrticQpEuHKiMdVCuQ3dcVEcnHGusBdsV

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Pass to serialization endpoint version = 2 and to broadcast version = 2

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Looking at the serialization endpoint, I fixed my transaction serialization and now it generates the correct byte sequence. However, if you do not specify version 3 in the sent json, the node will automatically substitute the wrong version 1. After I have signed the bytes, I send a json transaction to the endpoint, adding a version 3 field to it: (watch the screenshot)
That is, the bytes of the version were not taken into account when signing. Should I specify version bytes in the signature? I think not, it is not given in the documentation (the table above). In the end, I get all the same error.

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So it is from wavesplatform, as waves-transactions, i do not get it. Why you writing your own serialization?

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How can you avoid third-party with keccak256/blake2b/curve25519 signing? Are you writing your own signature/hash from scratch??

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I already pointed where your error is. In serialization (or version). And you have the endpoint to check your serialization is correct. Then you fix you can try to sign again.

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Tried this lib? A bit outdated, but still
https://github.com/wavesplatform/waves-transactions

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I pointed to serialization endpoint not broadcasting ^

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I think you did version 2

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I tried to make a byte-by-byte transaction, as in the documentation

typescript 
const txDataBytes = new Uint8Array(91);

      txDataBytes[0] = txData.type;
      txDataBytes.set(bs58.decode(txData.senderPublicKey), 1);
      txDataBytes[33] = txData.amountAssetFlag;
      txDataBytes[34] = txData.feeAsset;
      txDataBytes.set(new Uint8Array(new BigInt64Array([BigInt(txData.timestamp)]).buffer), 35);
      txDataBytes.set(new Uint8Array(new BigInt64Array([BigInt(txData.amount)]).buffer), 43);
      txDataBytes.set(new Uint8Array(new BigInt64Array([BigInt(txData.fee)]).buffer), 51);
      txDataBytes.set(bs58.decode(txData.recipient), 59);
      txDataBytes[85] = txData.attachmentLen;
      txDataBytes.set(new Uint8Array(txData.attachmentBytes), 87);

const txDataBuffer: Buffer = Buffer.from(txDataBytes);

txData - an item without a signature

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txDataBuffer?

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If you have real question, not potential - ask them here. This is the purpose of this chat

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https://youtu.be/WOh32CUxm84

1:21:08

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Responsible? I think he is in charge of the core team, but many flows switched to decentralized approaches via https://app.power.tech/ and https://dao.unit0.dev/

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Do not guess, you can use any libs to understand things and then make your own.

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but it doesnt work to

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If you do version 2, why you add version 3?

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for educational purposes, I was given this task. Without using third-party dependencies (only if copying, but not importing), write functions for creating a txBuild transaction, signing a txSign, and sending it to the network

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i use ( ctrl c + ctrl v )
https://github.com/wavesplatform/curve25519-js

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I'll try to figure it out and write to you again. Thank you so much for such quick feedback!

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my task is to avoid using third-party libraries. :(As a last resort, I'll try to send a transaction through this library, and figure out its code so that I don't end up using it.

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Version 3 transfer transaction is protobuf like (serialization)

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after this error, I turned to you!

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You can always check yourself here: http://nodes.wavesnodes.com/api-docs/index.html#/utils/serializeTx

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If you are doing some your own code for signing Waves transactions, this is the best reference to start: https://docs.waves.tech/en/blockchain/waves-protocol/cryptographic-practical-details

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Hi @deemru! Yesterday I scrolled through a lot of questions on the 2018-2019 forum, and you actively answered there, it was unexpectedly nice to find you here! I need your help. In my app, I am trying to sign a transfer transaction, but I encounter error 112 invalid signature. I collected the necessary bytes exactly according to the documentation, hashed them using keccak + blake

      const txHash: Buffer = createKeccakHash('keccak256').update(blake2b256(txDataBuffer)).digest();

, and signed them using a private key and curve25519. I think the problem may be that I am sending the wrong json structure. Here is one of the options that I sent:
{
type: 4,
version: 3,
sender: '3PLYHmpVK9T5tQSTUf3W7wz8vT7RwyeCqr7',
senderPublicKey: 'GHkVCQTEEBiagP1ikpEut4pTWj1gKcqCePkp9esMJqY4',
recipient: '3PHPyhDzeMNSKQiXAG3zJp3dB1D3MkDkdVF',
amount: 500000,
fee: 100000,
timestamp: 1736429211225,
attachment: '',
proofs: [
'9BVzCWAwRF4DDqbVBuRArFmqxdF1K8bipPC6YC9y3iHptorDLfA47w5r7ntu3AUtvw4hhrEaXQpgyF1JMw8qjNh'
],
chainId: 87
}
ps: можно перейти на русский )

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Hello everyone,

I am Archimedian, the founder of the MCE token recently deployed on the Waves blockchain.
Our project aims to create a financing tool for energy projects worldwide.

I would like to be connected with a representative or administrator to discuss potential questions I have regarding the platform.

For more information, feel free to visit our website: mkfinanceshome.com
Alternatively, you can contact me directly via private message.

Best regards,
Archimedian

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In the recent interview he said that he sold all his WAVES, that's why I am asking

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Is Sasha still responsible for the ecosystem?

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