What is the equivalent of ethers.utils.splitSignature in viem?

[bigint]

We stuck with the migration here https://github.com/lensterxyz/lenster/blob/main/apps/web/src/lib/splitSignature.ts#L10

[jxom]

Probably worth just using @noble/curves for this and derive those values from the Signature instance which has r, s and v.
Can use fromCompact to instantiate, e.g:
https://github.com/wagmi-dev/viem/blob/88152e9538f35b80919c81e8be99b99291c107c3/src/utils/signature/recoverPublicKey.ts#L24

[bigint]

I tried but no luck, do you have any ideas to do it 🙇🏼 ?

[jxom]

import { secp256k1 } from '@noble/curves/secp256k1'

const signatureHex = '0x6e100a352ec6ad1b70802290e18aeed190704973570f3b8ed42cb9808e2ea6bf4a90a229a244495b41890987806fcbd2d5d23fc0dbe5f5256c2613c039d76db81c'
const { r, s } = secp256k1.Signature.fromCompact(signatureHex.slice(2, 130))
const v = hexToNumber(`0x${signatureHex.slice(130)}`)

[jxom]

Can probably make a util for this when I get some time.

[dalechyn]

@jxom this would be awesome, just stuck at it too.

[dalechyn]

For anyone wondering how to re-build signature with r, s, v, try that:

const signature = `0x${new secp256k1.Signature(
        bytesToBigint(r),
        bytesToBigint(s)
      ).toCompactHex()}${bytesToNumber(v)}

[grmkris]

any updates