Signing Mary transaction

[emurgo]

Signing Mary transaction

[SebastienGllmt]

https://github.com/ArkEcosystem/platform-sdk/blob/a1850682b95714e360fd9a8dcd3ce3f6cee05220/packages/platform-sdk-ada/src/services/identity/shelley.ts#L39

for deriveSpendKey, deriveChangeKey and deriveStakeKey these should NOT be hardened (in the same way they are not hardened in BIP44). Only derivation paths up the account key are hardened.

[SebastienGllmt]

CardanoWasm.TransactionHash.from_bytes(Buffer.from(utxo.transaction.hash, "hex"))

This is incorrect, You have to use the hash of the tx you're building, not the hash of the tx the utxo belongs to (aka use txHash instead like you have later in the code). Transactions will fail if you add witnesses that aren't required to avoid people dumping unnecessary witnesses onto the chain.

Also, are you sure the UTXO belongs to the account key and not an address generated from the account key?

[faustbrian]

CardanoWasm.TransactionHash.from_bytes(Buffer.from(utxo.transaction.hash, "hex"))

This is incorrect, You have to use the hash of the tx you're building, not the hash of the tx the utxo belongs to (aka use txHash instead like you have later in the code). Transactions will fail if you add witnesses that aren't required to avoid people dumping unnecessary witnesses onto the chain.

Changed it back to what we had previously ArkEcosystemArchive/platform-sdk@1f04ce0. Currently we are using 3 values to sign, which of those would be required or allowed to be used before the transaction gets rejected?

Also, are you sure the UTXO belongs to the account key and not an address generated from the account key?

We derive UTXO for a specific address like this https://github.com/ArkEcosystem/platform-sdk/blob/feat/broadcast-tx-graphql/packages/platform-sdk-ada/src/services/transaction.ts#L215-L238. Is there any way to retrieve UTXO directly for an account key or how should we retrieve UTXO to sign a new transaction?

[SebastienGllmt]

You're going to have to build a mapping of which derivation path corresponds to which address in the wallet that way you know which path to use to derive the key for the witness

Is there any way to retrieve UTXO directly for an account key or how should we retrieve UTXO to sign a new transaction?

You can't get the UTXO by querying addresses. You have to get UTXOs by querying the payment credentials inside the transactions. I don't use cardano-graphql so I'm not sure the best way to do that kind of query

[faustbrian]

Thanks, will give the derivation path mapping a shot and see if we can get the transaction accepted.

[marianogoldman]

@SebastienGllmt. Before going for the calculation of the full mapping, we're trying to have at least one transaction accepted with all data controlled. So we're trying a specific address which has only one utxo, but we can't get it through, so not even sure how to build the mapping if we can't get this one right. Perhaps you can easily spot what's wrong...

In this test we're trying to do the transfer.

This is the code that creates and signs the transaction.

[faustbrian]

Thanks! Overlooked that bit, working fine now.