Offchain (Arbitrary) Data
On this page, we'll provide an example of how to sign and verify arbitrary data as per the ADR-036 specification on Cosmos.
Sign and verify using a browser wallet like Keplr
(async () => {
const message = "Offline Sign Message Example";
const signer = 'inj1...'
const chainId = 'injective-1'
// Sign Arbitrary Data
const signature = await window.keplr.signArbitrary(chainId, signer, message)
// Verify Arbitrary Data
const result = await window.keplr.verifyArbitrary(chainId, signer, message, signature)
if (result) {
console.log("Signature is valid");
}
})();
Sign and verify using PrivateKey in a CLI environment
import { config } from "dotenv";
import { PrivateKey, generateArbitrarySignDoc } from "@injectivelabs/sdk-ts";
config();
(async () => {
const { privateKey } = PrivateKey.generate();
const injectiveAddress = privateKey.toBech32();
const publicKey = privateKey.toPublicKey();
const message = "Offline Sign Message Example";
const { signDocBuff } = generateArbitrarySignDoc(message, injectiveAddress);
const signature = await privateKey.sign(signDocBuff);
const signatureInHex = Buffer.from(signature).toString("hex");
if (
PrivateKey.verifyArbitrarySignature({
signature: signatureInHex,
signDoc: signDocBuff,
publicKey: publicKey.toHex(),
})
) {
console.log("Signature is valid");
}
})();
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