How to use yParity instead of v?

[Robsonsjre]

Ethers Version

5.5.1

Search Terms

eth_signTypedData_v4, signature, "v"

Describe the Problem

Hello, I'm receiving 0 for the "v" value of the signature object. Hence, when passing this to the contract, the transaction is reverting with the msg error:
“execution reverted: ECDSA: invalid signature ‘v’ value”.

What could be causing this issue?

Some specs to generate the signature;

• Using Metamask + Hardware Ledger

Code Snippet

No response

Contract ABI

No response

Errors

No response

Environment

Ethereum (mainnet/ropsten/rinkeby/goerli)

Environment (Other)

No response

[sisou]

Apparently, if v is not 27 or 28, you need to add 27 to it:

if (![27, 28].includes(v)) v += 27;

[ricmoo]

Don't just “add 27” to it. The calculations of V is somewhat complicated, depending on the range it belongs to.

You are using an old version of ethers, please make sure you use the latest version.

In the case of 0 or 1, it is safe to add 27, but not in the general case. But that shouldn’t matter, because the splitSignature function in v5 (and Signature.from in v6) will properly handle convert it got you.