Resolvers may implement any subset of the record types specified here. Where a record types specification requires a resolver to provide multiple functions, the resolver MUST implement either all or none of them.
Resolvers MUST specify a fallback function that throws.
Resolvers must implement ERC-165 interface detection standard. supportsInterface method must return if the interfaceID queried is simply equal to the signature hash of the function that resolves the desired resource record.
Currently standardized resolver interfaces are specified in the table below.
| Interface name | Description | Query via | Interface id | Specs |
| addr | RSK Address | addr(bytes32 node) |
0x3b3b57de |
Address resolver |
| hash | 32 bytes | hash(bytes32 node) |
0xd8389dc5 |
- |
| chain addr | Chain Address | chainAddr(bytes32,bytes4) |
0x8be4b5f6 |
Chain address resolver |