Token Configuration

Take a look at config file.

import {
  chains,
  createConfig,
  createTheme,
  tokens,
} from "polkadot-sufficient-assets";
 
export const config = createConfig({
  sourceChains: [chains.polkadotAssetHubChain], // Specify the chain
  tokens: {
    pah: {
      token: tokens.USDT, // Token you want to transfer
      feeTokens: [tokens.DOT, tokens.USDT], // Tokens used to pay transaction fees
    },
  },
  useXcmTransfer: false,
  destinationChains: [chains.hydration],
});

In createConfig we have tokens setup which will use for selecting network you would like to use for your application.

Default Tokens

The library exports a list of predefined tokens that you can use directly in your configuration. Here's an example of the default tokens available:

import { tokens } from "./create-chain";
 
const knownTokens = [
  tokens.DOT,
  tokens.KSM,
  tokens.PAS,
  tokens.ROC,
  tokens.WND,
];

Creating Custom Tokens

If you need to use a custom token that isn't predefined, you can create one using the createToken function.

Example: Adding USDT

To configure USDT (Tether USD) as a token, use the following setup:

import { createToken } from "polkadot-sufficient-assets";
 
export const USDT = createToken({
  assetId: 1984, // Unique asset ID on the chain
  type: "asset", // Type of the asset ('asset' or 'native')
  decimals: 6, // Number of decimal places for the token
  symbol: "USDT", // Token symbol
  name: "Tether USD", // Full token name
  logo: "./img/tokens/USDT.svg", // Path to token logo (optional)
  isSufficient: true, // Whether the token is sufficient for certain operations (like fee payments)
});

Explanation

• assetId: The unique identifier for the token on the chain.
• type: Specifies if the token is a native asset or another type (like an asset issued on a parachain).
• decimals: Defines the precision of the token (e.g., 6 for USDT).
• symbol: The short identifier for the token, often used in UIs.
• name: The full descriptive name of the token.
• logo: Optional path to the token's logo image.
• isSufficient: A boolean indicating if the token can be used to pay fees directly without needing additional balances of native tokens.

API Reference

Here’s a quick reference for the properties used in the createToken function: