Substrate | SignatureInvalid when I try to verify signature with public key

Question

When I try to verify a signature using Alice address I got a SignatureInvalid message.

echo "blabla" | ./target/release/subkey verify
102f4f19773b0157c87561b9b6bfa07558246cbe0155a74ffd8f6365d4d14865a92f58a928b504dd6dd392b67e8a52a58832822c3f1b89f262f1921a286f8c8 5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY


Error: SignatureInvalid

Any help is welcome, thank you.

Answer 1

How are you doing the signature? Following the account generated in the example from the docs https://docs.substrate.io/reference/command-line-tools/subkey/

You can create a signature of a message:

echo "blabla" | ./target/release/subkey sign --suri 0xc8fa03532fb22ee1f7f6908b9c02b4e72483f0dbd66e4cd456b8f34c6230b849

It gives you this result:

c4273e58b19b582330577f380041171d7aa9def2922e492e1b5510bc17a03f3fe19ae2b4f8089a7b4ba821fabffb97596245aa6caecf686a9ff119010374af8f

That then you can validate with its corresponding account: 5Gv8YYFu8H1btvmrJy9FjjAWfb99wrhV3uhPFoNEr918utyR

echo "blabla" | ./target/release/subkey verify c4273e58b19b582330577f380041171d7aa9def2922e492e1b5510bc17a03f3fe19ae2b4f8089a7b4ba821fabffb97596245aa6caecf686a9ff119010374af8f 5Gv8YYFu8H1btvmrJy9FjjAWfb99wrhV3uhPFoNEr918utyR

And the result is ok:

Signature verifies correctly.