1.1 Supported Chains and Tokens

This section provides APIs to query the chains and tokens currently supported by the Wanchain Bridge.

There are two primary endpoints:

• tokenPairs

• tokenPairsHash

The tokenPairs endpoint returns detailed information about all supported chains and cross-chain tokens. Since this response can be large, it is recommended to first retrieve tokenPairsHash and compare it with the previously stored value. If there is no change, the locally cached data can be used to avoid unnecessary network requests each time.

tokenPairs Endpoint

URL:

https://bridge-api.wanchain.org/api/tokenPairs

Response Example:

{
  "success": true,
  "data": [
    {
      "tokenPairID": "453",
			"symbol": "USDC",
      "fromChain": {
        "chainId": "0xa4b1",
        "slip44ChainID": "0x40000002",
        "chainType": "ARETH",
        "chainName": "Arbitrum"
      },
      "toChain": {
        "chainId": "0x38",
        "slip44ChainID": "0x800002ca",
        "chainType": "BNB",
        "chainName": "BNB Chain"
      },
      "fromToken": {
        "address": "0xaf88d065e77c8cc2239327c5edb3a432268e5831",
        "name": "USD Coin",
        "symbol": "USDC",
        "decimals": "6"
      },
      "toToken": {
        "address": "0x8ac76a51cc950d9822d68b83fe1ad97b32cd580d",
        "name": "USD Coin",
        "symbol": "USDC",
        "decimals": "18"
      }
    },
	  ...
  ]
}

As shown above, the returned data is an array containing all supported cross-chain token pairs on Wanchain, totaling over 300 items. You can apply local filtering based on your requirements before using the data. For instance, you can filter by fromToken and toToken addresses.

It is important to note that the tokenPairs data is bidirectional, meaning you do not need to consider the direction of from and to—as long as the chain and token addresses match, the pair is valid.

tokenPairsHash Endpoint

URL:

https://bridge-api.wanchain.org/api/tokenPairsHash

Response Example:

{
  "success": true,
  "data": "39736194f3b3ecedb401fdfa6e4410b0"
}

This endpoint is used to check whether the tokenPairs data has changed before fetching the full dataset from the tokenPairs endpoint.