Signature

1import Crypto
2
3access(all) contract Signature {
4    access(account) fun verify(signature: [UInt8], signedData: [UInt8], account: &Account, keyIndex: Int): Bool {
5        let key = account.keys.get(keyIndex: keyIndex) ?? panic("Keys that cannot be referenced cannot be used")
6        assert(!key.isRevoked, message: "Revoked keys cannot be used")
7
8        let keyList = Crypto.KeyList()
9        keyList.add(
10            key.publicKey,
11            hashAlgorithm: key.hashAlgorithm,
12            weight: key.weight
13        )
14
15        let signatureSet: [Crypto.KeyListSignature] = [
16            Crypto.KeyListSignature(
17                keyIndex: 0,
18                signature: signature
19            )
20        ]
21
22        return keyList.verify(
23            signatureSet: signatureSet,
24            signedData: signedData,
25            domainSeparationTag: "FLOW-V0.0-user"
26        )
27    }
28}
29