Resolving Names on chain

These are the steps to resolve a .IP domain to an Ethereum address:

1. Convert the name string to a name hash using the normalizer.
2. Query the EBPTO registry for resolver contract for the hash.
3. Query the resolver contract for the address.

Here is some example Solidity code that implements these steps for resolving a name string to an address:

interface EBPTO {
    function resolver(bytes32 node) external view returns (Resolver);
}

interface Resolver {
    function addr(bytes32 node) external view returns (address);
}

interface Normalize4 {
    function normhash(string memory) external view returns (bytes32 node);
}

contract NameToAddressDemo {
    EBPTO registry = EBPTO(0xDd0Bc20FB93E3033C9282E322f897fC2997F7f92);
    Normalize4 normalizer = Normalize4(0x4D6F2f6f6dd9F48251657D6FAE53fea73c3f1E60);

    function resolve(string memory name) public view returns (address) {
        bytes32 node = normalizer.normhash(name);
        
        Resolver resolver = registry.resolver(node);
        return resolver.addr(node);
    }
}