Sign message "invalid raw signature length" error

[jarethuk]

Hi,

I am trying to sign a message sent from my server using the SmartAccountClient but when I verify the message on the server I get the error "invalid raw signature length".

I have had everything working using various other wallets and signers so I don't believe this to be a server issue but I have noticed that the response in "https://api.g.alchemy.com/signer/v1/sign-payload" looks correct but then when I log the signature returned by the function, it is much different.

Am I missing a conversion or something like that to get a valid signature or is a different scheme used?

Minimal Example:

const message = 'Test';

const {
	client: signer
} = useSmartAccountClient({
	type: 'LightAccount',
});

// Later inside of a useEffect
const signature = await signer.signMessage({
	message
});

console.log(signature);

// 0x0000000000000000000000000000000000400cdfef5e2714e63d8040b700bc24000000000000000000000000000000000000000000000000000000000000006000000
000000000000000000000000000000000000000000000000000000000e000000000000000000000000000000000000000000000000000000000000000445fbfb9cf000000000000000000000000c77b8856fc3f37e65d3294d6a97714e6095e07ee0000000000
000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000042009682942833e8c1a9d206aee672486
9e0778a7d6892cce8f51f0082655a13988e6336af423844dfaae8bb3c31e51aaad07ca870dcf3467d813b3518932d3135c11b0000000000000000000000000000000000000000000000000000000000006492649264926492649264926492649264926492649264926492649264926492

Response from "https://api.g.alchemy.com/signer/v1/sign-payload" for the above which looks better to me:

0xa7f3daa904502bee80fb1f1c29d52d65b53ebbe073db9b3b848fb9ec6b50ae9569b5b02772de4729f32b2c05010394f8f9102c1550f6fc4d54fa1fbc68b220831b