shove-js/src/contract/utils.ts

SDK for shove.bet

import { toUtf8Bytes } from "ethers";
import { keccak256 } from "ethers";

/**
 * Converts a bigint value to a hexadecimal string representation with leading zeros.
 * @param value The bigint value to convert.
 * @param length The desired length of the hexadecimal string (default is 64 characters).
 * @returns A hexadecimal string representation of the bigint value.
 */
export function bigintToHex(value: bigint, length: number = 40): string {
  // Convert bigint to hex and remove the '0x' prefix
  const hexString = value.toString(16);
  // Pad the hex string with leading zeros to the specified length
  return "0x" + hexString.padStart(length, "0");
}

/**
 * Pads a hex string with leading zeros to reach the target length (in bytes)
 * @param hexString - The hex string to pad (with or without 0x prefix)
 * @param byteLength - The target length in bytes (default: 32 for 256-bit values)
 * @returns The padded hex string with 0x prefix
 */
export function padHexString(
  hexString: string,
  byteLength: number = 32,
): string {
  const hex = hexString.startsWith("0x") ? hexString.slice(2) : hexString;
  const targetLength = byteLength * 2;
  const padded = hex.padStart(targetLength, "0");

  return "0x" + padded;
}

/**
 * Converts an event signature to its keccak256 hash (topic0)
 * @param signature - The event signature (e.g., "Deposit(address,address,uint256,address)")
 * @returns The keccak256 hash of the signature with 0x prefix
 */
export function getEventTopic(signature: string): string {
  return keccak256(toUtf8Bytes(signature));
}