invalid high s-value encountered in r1 signature at /v1/chain/send_transaction2

[dev-dantealighieri]

Hi

Once in a ~10 transaction, I am getting the following error:
"message": "invalid high s-value encountered in r1 signature at /v1/chain/send_transaction2", "stack": "exception: invalid high s-value encountered in r1 signature at /v1/chain/send_transaction2\n at APIClient.<anonymous> (/Users/dev-dante/Documents/Codes/eos/node_modules/@wharfkit/antelope/src/api/client.ts:139:19)\n at Generator.next (<anonymous>)\n at fulfilled (/Users/dev-dante/Documents/Codes/eos/node_modules/tslib/tslib.js:114:62)\n at processTicksAndRejections (node:internal/process/task_queues:95:5)" } }

I looked through the code base but couldn't figure out what's the reason. The error is coming from this line.

PS:
I am using wharfkit/antelope library to send transaction.
My accounts public/private key is R1, not K1.

[bhazzard]

@dev-dantealighieri Are you using a custom signature provider implementation?

@aaroncox does this ring any bells for you?

[dev-dantealighieri]

yes, I'm using secp256r1 implementation of elliptic javascript library, I'm not using antelope's own signer. (I am performing offline signing). I am using R1 public and private keys.

[spoonincode]

You need to make sure the signature is in canonical format which for secp256r1 signatures in leap means the s value is less than the half order of the curve. If you're using elliptic it can do that for you by passing canonical: true. For example, how wharfkit passes that option when performing the signatur with elliptic,
https://github.com/wharfkit/antelope/blob/master/src/crypto/sign.ts#L22

[spoonincode]

Closing due to inactivity for over a month, if you need more help on this topic feel free to reply