ENS Permanent Registrar Support

[barrasso]

The new ENS Permanent Registrar is coming out soon, and it would be nice to have a set of convenient utility classes that allow for easy interaction with the updated contracts.

Web3swift already has Util classes for the registry and resolver, but is missing the registrar. Once this is completed, we could add web3swift to the list of supported ENS libraries.

Overview

Summary from the ENS docs:

The Permanent Registrar is the code that will govern allocation and renewal of names in the .eth TLD. Presently this is governed by the legacy auction registrar, which uses a Vickery Auction process to allocate names to registrants. The new registrar aims to simplify this process, while providing a stable platform for future improvements that will minimise API changes.

In addition, the registrar is an ERC721 compliant nonfungable token contract, meaning that .eth registrations can be transferred in the same fashion as other NFTs.

The target deployment date for the permanent registrar is the 4th of May, 2019.

Functional Spec

Ideally, the utility classes would support the basic functions defined in the BaseRegistrar and ETHRegistrarController. This includes the following functionality:

BaseRegistrar:

Read functions

• Get Name Expiry
  • Returns the unix timestamp at which a registration currently expires.
• Get Name Owner
  • ownerOf returns the address that owns the registration identified by the label hash, or reverts if the registration does not exist. This function is part of ERC721.

Write functions

• Transfer a Name
  • Used to transfer the registration. Behaves as specified in ERC721.
• Reclaim ENS Record
  • Sets the owner record of the name in the ENS registry to match the owner of the registration in this registry. May only be called by the owner of the registration.

ETHRegistrarController:

Read functions

• Check Name Availability
  • Returns true iff the name is both valid and available for registration by this controller.
• Get Rent Price
  • Returns the cost, in wei, to register or renew the provided name for the provided duration.
• Calculate Commitment Hash
  • Generates and returns a commitment hash from a name label (eg, 'myname', not 'myname.eth') owner, and secret value.

Write functions

• Submit Commitment
  • Submits a precommitment generated by calling makeCommitment.
• Register Name
  • Registers a name based on this criteria
• Extend Name Registration
  • Renews a name. This function can be called by anyone, as long as sufficient funds are provided.

[gitcoinbot]

Issue Status: 1. Open 2. Started 3. Submitted 4. Done

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[gitcoinbot]

Issue Status: 1. Open 2. Started 3. Submitted 4. Done

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Work has been started.

These users each claimed they can complete the work by 4 days, 9 hours from now.
Please review their action plans below:

1) baldyash has been approved to start work.

• study ens registrar
• implement its functionality

Learn more on the Gitcoin Issue Details page.

[BaldyAsh]

@barrasso hi. Think its done. I've completely changed ENS classes, you can look at them here and tests for them here. Also I've added usage.
Unfortunately I can’t find the BaseRegistrar and RegistrarController contracts for tests, but think there won't occur any problems with them

[barrasso]

@BaldyAsh Thanks! I'm looking over this now. Great work 😀I'll close the bounty soon.

FYI, I was also looking for the new registrar contracts to test. Here is Nick Johnson's response:

You can find them by looking up the owner of the .eth domain in the registry. (Don't hardcode the registrar address in your code - it can change, while looking up the owner will always work)

[barrasso]

Side note: I want to perform a Reverse Resolution on a specific address.

Is this the correct method?

// I want to know if an address resolves to a .eth name
// e.g. wallet address = '0x3487acfb1479ad1df6c0eb56ae743d34897798ac'

let node = "3487acfb1479ad1df6c0eb56ae743d34897798ac.addr.reverse"
let name = try! ens.getName(forNode: node)

[BaldyAsh]

@barrasso forgot about reverse registrar, I'll make it today

[BaldyAsh]

@barrasso added reverse registrar

ens.setReverseRegistrar(withAddress: EthereumAddress("0x314159265dd8dbb310642f98f50c066173c1259b")!)
let name = try ens.reverseRegistrar!.getReverseRecordName(address: EthereumAddress("0x314159265dd8dbb310642f98f50c066173c1259b")!)

[gitcoinbot]

⚡️ A tip worth 2.50000 ETH (418.29 USD @ $167.31/ETH) has been granted to @BaldyAsh for this issue from @barrasso. ⚡️

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[gitcoinbot]

Issue Status: 1. Open 2. Started 3. Submitted 4. Done

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This Bounty has been completed.

Additional Tips for this Bounty:

• barrasso tipped 2.5000 ETH worth 418.29 USD to baldyash.

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