121:   function setDestinationChainContractAddress(
122:     string memory destinationChain,
123:     address contractAddress
124:   ) external onlyOwner {
125:     destChainToContractAddr[destinationChain] = AddressToString.toString(
126:       contractAddress
127:     );
128:     emit DestinationChainContractAddressSet(destinationChain, contractAddress);
129:   }
234:   function addChainSupport(
235:     string calldata srcChain,
236:     string calldata srcContractAddress
237:   ) external onlyOwner {
238:     chainToApprovedSender[srcChain] = keccak256(abi.encode(srcContractAddress));
239:     emit ChainIdSupported(srcChain, srcContractAddress);
240:   }
68:     if (bytes(destContract).length == 0) {
69:       revert DestinationNotSupported();
70:     }
71: 
96:     if (chainToApprovedSender[srcChain] == bytes32(0)) {
97:       revert ChainNotSupported();
98:     }
function removeDestinationChainContractAddress(
  string memory destinationChain
) external onlyOwner {
  delete destChainToContractAddr[destinationChain];
  emit DestinationChainContractAddressRemoved(destinationChain);
}
function removeChainSupport(
  string calldata srcChain
) external onlyOwner {
  delete chainToApprovedSender[srcChain];
  emit ChainIdRemoved(srcChain);
}
