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authorLeonid Logvinov <logvinov.leon@gmail.com>2017-05-25 00:06:58 +0800
committerLeonid Logvinov <logvinov.leon@gmail.com>2017-05-25 00:06:58 +0800
commitaf3cb84ff9229f85a8ea4a8c9c71511912ea0947 (patch)
tree0bb0f22531daa225d320594687f474649ef1280a /src
parentb5bd772b240e656ed95150e0d1b6bd77f754aa5c (diff)
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Add isSignatureValid method and tests for it
Diffstat (limited to 'src')
-rw-r--r--src/ts/0x.js.ts32
-rw-r--r--src/ts/globals.d.ts1
2 files changed, 30 insertions, 3 deletions
diff --git a/src/ts/0x.js.ts b/src/ts/0x.js.ts
index 95446ad74..6d6d5fed6 100644
--- a/src/ts/0x.js.ts
+++ b/src/ts/0x.js.ts
@@ -1,6 +1,32 @@
+import * as ethUtil from 'ethereumjs-util';
+
+/**
+ * Elliptic Curve signature
+ */
+export interface ECSignature {
+ v: number;
+ r: string;
+ s: string;
+}
+
+export type ETHAddress = string;
+
export class ZeroEx {
- /** Verifies the signature */
- public verifySignature() {
- // TODO
+ /**
+ * Checks if the signature is valid
+ */
+ public static isValidSignature(data: string, signature: ECSignature, signer: ETHAddress): 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;
+ }
}
}
diff --git a/src/ts/globals.d.ts b/src/ts/globals.d.ts
new file mode 100644
index 000000000..99f9cf50b
--- /dev/null
+++ b/src/ts/globals.d.ts
@@ -0,0 +1 @@
+declare module 'ethereumjs-util';