1  import { assert } from "@std/assert";
 2  import { Address, PublicClient, toBytes, zeroAddress } from "viem";
 3  import { abi, tokenAddresses } from "@massmarket/contracts";
 4  
 5  // Any utility functions for tokens
 6  export const getTokenAddress = (
 7    symbol: string,
 8    chainId: number,
 9  ): Uint8Array => {
10    if (symbol === "ETH") return toBytes(zeroAddress);
11    if (symbol === "EDD") return toBytes(abi.eddiesAddress);
12    const addresses: {
13      [key: string]: {
14        [key: string]: string;
15      };
16    } = tokenAddresses;
17    const tokenAddress = addresses[chainId][symbol] as Address;
18  
19    if (!tokenAddress) {
20      throw new Error(`Token not found for ${symbol} on chainId: ${chainId}`);
21    }
22    return toBytes(tokenAddress);
23  };
24  
25  export const getTokenInformation = (
26    publicClient: PublicClient,
27    tokenAddress: `0x${string}`,
28  ): Promise<[string, number]> => {
29    assert(publicClient.chain, "publicClient.chain is undefined");
30    if (tokenAddress === zeroAddress) {
31      return new Promise((resolve) => {
32        resolve(["ETH", 18]);
33      });
34    }
35    const symbol = publicClient.readContract({
36      address: tokenAddress,
37      abi: abi.eddiesAbi,
38      functionName: "symbol",
39      args: [],
40    }) as Promise<string>;
41    const decimal = publicClient.readContract({
42      address: tokenAddress,
43      abi: abi.eddiesAbi,
44      functionName: "decimals",
45      args: [],
46    }) as Promise<number>;
47    return Promise.all([symbol, decimal]);
48  };