Enforce that the signer passed is the one that sign the transaction

[CremaFR]

Do this by calling is_valid_signature on the account

[CremaFR]

Do this by calling is_valid_signature on the account

This does not work. Need to instead call the readOnPlugin to get the pub_key. See how it will work with plugin with many pub_keys

[CremaFR]

Suggestion from btchip. add a new field "signature_scheme" to know how to verify the transaction's signature locally to link it to the pub_key sent