Multi-Crypto Resolver

Multi-Crypto Resolver

In the RNS registry we have launched a resolver capable of resolve addresses from other blockchains using a chain id as an identifier. With the same restrictions and visibility as the Public Resolver. This resolver implements all the methods described in the resolver specification

Mainnet information

• Multi-Crypto Resolver Adrress: 0x99a12be4C89CbF6CFD11d1F2c029904a7B644368
• ABI: MultiCryptoResolverABI.json

See RNS Testnet section for testing environment information.

Index

• Methods
  • content
  • setContent
  • chainAddr
  • setChainAddr
  • chainMetadata
  • setChainMetadata
  • setChainAddrWithMetadata
• Events
  • ChainAddrChanged

Context

AbstractRNS rns;

• rns: the Registry contract

Storage

mapping(bytes32=>address) addresses;
mapping(bytes32=>bytes32) hashes;

• adresses: for each namehash entry, stores an address
• hashes: for each namehash entry, stores a hash

Methods

content

Returns the content hash associated with an RNS node. Note that this resource type is not standardized, and will likely change in future to a resource type based on multihash.

Signature

function content(bytes32 node) public view returns (bytes32)

Parameters node: the RNS node to query.

Returns

• bytes32: the associated content hash.

setContent

Sets the content hash associated with an RNS node. May only be called by the owner of that node in the RNS registry. Note that this resource type is not standardized, and will likely change in future to a resource type based on multihash.

Signature

function setContent(bytes32 node, bytes32 hash) public only_owner(node)

Parameters

• node: the node to update.
• hash: the content hash to set

Multi-Crypto Resolver Methods

supportsInterface

Returns true if the resolver implements the interface specified by the provided hash.

This Resolver supports

• 0x3b3b57de = sha3(addr(bytes32))
• 0xd8389dc5 = sha3(content(bytes32))

Signature

function supportsInterface(bytes4 interfaceID) public pure returns (bool)

Parameters

• interfaceID: the ID of the interface to check for.

Returns

• bool: true if the contract implements the requested interface.

addr

Returns the address associated with an RNS node. Same as calling chainAddr with this node and Rootstock (RSK) chain id as parameters.

Signature

function addr(bytes32 node) public view returns (address)

Parameters

• node: the RNS node to query.

Returns

• string: the associated address.

setAddr

Sets the address associated with an RNS node, using the Rootstock chain id as default chain. May only be called by the owner of that node in the RNS registry.

Signature

function setAddr(bytes32 node, address addrValue) public only_owner(node)

Parameters

• node: the node to update.
• addrValue: the address to set.

content

Returns the content hash associated with an RNS node. Note that this resource type is not standardized, and will likely change in future to a resource type based on multihash.

Signature

function content(bytes32 node) public view returns (bytes32)

Parameters node: the RNS node to query.

Returns

• bytes32: the associated content hash.

setContent

Sets the content hash associated with an RNS node. May only be called by the owner of that node in the RNS registry. Note that this resource type is not standardized, and will likely change in future to a resource type based on multihash.

Signature

function setContent(bytes32 node, bytes32 hash) public only_owner(node)

Parameters

• node: the node to update.
• hash: the content hash to set

chainAddr

Returns the address associated with an RNS node for a particular chain id. Using the RSKCHAINID as the default chain if no one is provided.

Signature

function chainAddr (bytes32 node, bytes4 chain) public view returns (string memory)

Parameters

• node: the RNS node to query.
• chainId: The identifier of the blockchains acording to slip-0044.

Returns string: The address associated with the node in the specified chainId. If no chain id, RSKCHAINID will be the default chain if no one is supplied.

setChainAddr

Sets the address associated with an RNS node and a chain id. May only be called by the owner of that node in the RNS registry. Emits the AddrChanged event if the chainId supplied was RSKCHAINID, otherwise emits ChainAddrChanged.

Signature

function setChainAddr(bytes32 node, bytes4 chainId, string memory addrValue) public onlyOwner(node)

Parameters

• node: the RNS node to query.
• chainId: The identifier of the blockchains acording to slip-0044.
• addrValue: The address to set.

chainMetadata

Returns the metadata stored in a RNS node for a specified chain id. Emits ChainMetadataChanged.

Signature

function chainMetadata (bytes32 node, bytes4 chainId)

Parameters

• node: the RNS node to query.
• chainId: The identifier of the blockchains acording to slip-0044.
• addrValue: The address to set.

Returns

The associated metadata with that node.

setChainMetadata

Stores metadata associated with a particular RNS node in the specified chain id. Emits an event ChainMetadataChanged

Signature

function setChainMetadata (bytes32 node, bytes4 chain, bytes32 metadataValue)

Parameters

• node: the RNS node to query.
• chainId: The identifier of the blockchains acording to slip-0044.
• metadataValue: The data to set.

setChainAddrWithMetadata

Its a call to both methods setChainAddr and setChainMetadata Signature

function setChainAddrWithMetadata (bytes32 node, bytes4 chain, string memory addrValue, bytes32 metadataValue)

Parameters

• node: the RNS node to query.
• chainId: The identifier of the blockchains acording to slip-0044.
• addrValue: The address to set.
• metadataValue: The metadata to set.

Events

ChainAddrChanged

This events should be fired when the method setChainAddr is sucessfully called and has to propagate the information, if the chain is the RSKCHAINID, then the AddrChanged event is fired, specified in the Resolver specificaction:

• node: the node to update.
• addrValue: the address to set.
• chainId: The identifier of the blockchains acording to slip-0044.