@bit-gpt/h402/dist/shared/evm/createNonce.js

BitGPT's 402 open protocol for blockchain-native payments

const NONCE_BYTES = 32;
/**
 * Creates a cryptographically secure random nonce.
 *
 * A nonce is a random value used to ensure uniqueness in cryptographic operations.
 * This function generates a 32-byte random value using the Web Crypto API.
 *
 * @returns {Hex} A hexadecimal string prefixed with '0x' representing the random nonce
 * @throws {Error} If the random bytes generation fails
 */
function createNonce() {
    try {
        const randomBytes = crypto.getRandomValues(new Uint8Array(NONCE_BYTES));
        // Use browser-compatible approach to convert Uint8Array to hex string
        let hexString = '';
        for (let i = 0; i < randomBytes.length; i++) {
            const hex = randomBytes[i].toString(16).padStart(2, '0');
            hexString += hex;
        }
        console.log("[DEBUG] Generated nonce using browser-compatible approach");
        return `0x${hexString}`;
    }
    catch (error) {
        throw new Error(`Failed to generate nonce: ${error instanceof Error ? error.message : String(error)}`);
    }
}
export { createNonce };
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