Bridge API

Endpoints for cross-chain bridge operations using the Across protocol.

Endpoints

Get Bridge Routes

GET /bridge/routes

Retrieve available bridge routes for a token pair across chains.

Query Parameters:

Parameter	Type	Required	Description
sourceChainId	number	Yes	Origin chain ID
destChainId	number	Yes	Destination chain ID
tokenAddress	string	Yes	Token to bridge

Response:

{
  "routes": [
    {
      "sourceChain": 1,
      "destChain": 42161,
      "token": "USDC",
      "estimatedTime": "2-10 minutes",
      "available": true
    }
  ]
}

---

Get Bridge Fees

GET /bridge/fees

Calculate bridge fees for a specific route and amount.

Query Parameters:

Parameter	Type	Required	Description
sourceChainId	number	Yes	Origin chain ID
destChainId	number	Yes	Destination chain ID
tokenAddress	string	Yes	Token address
amount	string	Yes	Amount to bridge

Response:

{
  "totalFee": "2.50",
  "relayerFee": "1.50",
  "lpFee": "1.00",
  "estimatedReceived": "997.50"
}

---

Get Bridge Limits

GET /bridge/limits

Get minimum and maximum transfer limits for a bridge route.

Query Parameters:

Parameter	Type	Required	Description
sourceChainId	number	Yes	Origin chain ID
destChainId	number	Yes	Destination chain ID
tokenAddress	string	Yes	Token address

---

Execute Bridge Deposit

POST /bridge/deposit

Initiate a bridge transfer.

Request Body:

Field	Type	Required	Description
sourceChainId	number	Yes	Origin chain ID
destChainId	number	Yes	Destination chain ID
tokenAddress	string	Yes	Token to bridge
amount	string	Yes	Amount to bridge
walletAddress	string	Yes	Sender address
destinationAddress	string	No	Recipient address (defaults to sender)