Resolver

Parameters

• vns
• node
• contract

resolverAddress

resolverAddress returns the address of the resolver.

Returns any A promise for the address of the resolver.

reverseAddr

reverseAddr looks up the reverse record for the address returned by the resolver's addr()

Returns any A promise for the Resolver for the reverse record.

abi

abi returns the ABI associated with the name. Automatically looks for an ABI on the reverse record if none is found on the name itself.

Parameters

• Optional.null bool If false, do not look up the ABI on the reverse entry.
• reverse

Returns object A promise for the contract ABI.

contract

contract returns a web3 contract object. The address is that returned by this resolver's addr(), and the ABI is loaded from this resolver's ABI() method, or the ABI on the reverse record if that's not found. Returns null if no address is specified or no ABI was found. The returned contract object will not be promisifed or otherwise modified.

Returns object A promise for the contract instance.

VNS

Provides an easy-to-use interface to the Vapory Name Service.

Example usage:

var VNS = require('vapory-vns');
var Web3 = require('@vapory/web3');

var provider = new Web3.providers.HttpProvider();
var vns = new VNS(provider);

var address = vns.resolver('foo.vap').addr().then(function(addr) { ... });

Functions that require communicating with the node return promises, rather than using callbacks. A promise has a then function, which takes a callback and will call it when the promise is fulfilled; then returns another promise, so you can chain callbacks. For more details, see http://bluebirdjs.com/.

Notably, the resolver method returns a resolver instance immediately; lookup of the resolver address is done in the background or when you first call an asynchronous method on the resolver.

Functions that create transactions also take an optional 'options' argument; this has the same parameters as web3.

Parameters

• provider object A web3 provider to use to communicate with the blockchain.
• address address Optional. The address of the VNS registry. Defaults to the public VNS registry.

Meta

• author: Nick Johnson <[email protected]>
• license: LGPL

resolver

resolver returns a resolver object for the specified name, throwing VNS.NameNotFound if the name does not exist in VNS. Resolver objects are wrappers around web3 contract objects, with the first argument - always the node ID in an VNS resolver - automatically supplied. So, to call the addr(node) function on a standard resolver, you only have to call addr(). Returned objects are also 'promisified' - they return a Bluebird Promise object instead of taking a callback.

Parameters

• name string The name to look up.
• abi list Optional. The JSON ABI definition to use for the resolver. if none is supplied, a default definition implementing has, addr, name, setName and setAddr is supplied.

Returns any The resolver object.

reverse

reverse returns a resolver object for the reverse resolution of the specified address, throwing VNS.NameNotFound if the reverse record does not exist in VNS. Resolver objects are wrappers around web3 contract objects, with the first argument - always the node ID in an VNS resolver - automatically supplied. So, to call the addr(node) function on a standard resolver, you only have to call addr(). Returned objects are also 'promisified' - they return a Bluebird Promise object instead of taking a callback.

Parameters

• address string The address to look up.
• abi list Optional. The JSON ABI definition to use for the resolver. if none is supplied, a default definition implementing has, addr, name, setName and setAddr is supplied.

Returns any The resolver object.

setResolver

setResolver sets the address of the resolver contract for the specified name. The calling account must be the owner of the name in order for this call to succeed.

Parameters

• name string The name to update
• address address The address of the resolver
• options object An optional dict of parameters to pass to web3.
• addr
• params

Returns any A promise that returns the transaction ID when the transaction is mined.

owner

owner returns the address of the owner of the specified name.

Parameters

• name string The name to look up.
• callback

Returns any A promise returning the owner address of the specified name.

setOwner

setOwner sets the owner of the specified name. Only the owner may call setResolver or setSubnodeOwner. The calling account must be the current owner of the name in order for this call to succeed.

Parameters

• name string The name to update
• address address The address of the new owner
• options object An optional dict of parameters to pass to web3.
• addr
• params

Returns any A promise returning the transaction ID of the transaction, once mined.

setSubnodeOwner

setSubnodeOwner sets the owner of the specified name. The calling account must be the owner of the parent name in order for this call to succeed - for example, to call setSubnodeOwner on 'foo.bar.vap', the caller must be the owner of 'bar.vap'.

Parameters

• name string The name to update
• address address The address of the new owner
• options object An optional dict of parameters to pass to web3.
• addr
• params

Returns any A promise returning the transaction ID of the transaction, once mined.