aboutsummaryrefslogtreecommitdiffstats
path: root/src/ts/0x.js.ts
blob: 3b16b643baa0be841dbe4feb4712a6c232ad2ec6 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
import * as ethUtil from 'ethereumjs-util';

/**
 * Elliptic Curve signature
 */
export interface ECSignature {
    v: number;
    r: string;
    s: string;
}

export class ZeroEx {
    /**
     * Checks if the signature is valid
     */
    public static isValidSignature(data: string, signature: ECSignature, signer: ETHAddressHex): boolean {
        const dataBuff = ethUtil.toBuffer(data);
        const msgHashBuff = ethUtil.hashPersonalMessage(dataBuff);
        try {
            const pubKey = ethUtil.ecrecover(msgHashBuff,
                signature.v,
                ethUtil.toBuffer(signature.r),
                ethUtil.toBuffer(signature.s));
            const retrievedAddress = ethUtil.bufferToHex(ethUtil.pubToAddress(pubKey));
            return retrievedAddress === signer;
        } catch (err) {
            return false;
        }
    }
}