[
  {
    "inputs": [
      { "internalType": "contract IERC20", "name": "srcToken", "type": "address" },
      { "internalType": "contract IERC20", "name": "dstToken", "type": "address" }
    ],
    "name": "getRate",
    "outputs": [{ "internalType": "uint256", "name": "weightedRate", "type": "uint256" }],
    "stateMutability": "view",
    "type": "function"
  }
]