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auctionregistrar.go
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auctionregistrar.go
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// Copyright 2017-2023 Weald Technology Trading.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ens
import (
"fmt"
"math/big"
"time"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/wealdtech/go-ens/v3/contracts/auctionregistrar"
)
// AuctionRegistrar is the structure for the auction registrar contract.
type AuctionRegistrar struct {
backend bind.ContractBackend
domain string
Contract *auctionregistrar.Contract
ContractAddr common.Address
}
// AuctionEntry is an auction entry.
type AuctionEntry struct {
State string
Deed common.Address
Registration time.Time
Value *big.Int
HighestBid *big.Int
}
// NewAuctionRegistrar creates a new auction registrar for a given domain.
func NewAuctionRegistrar(backend bind.ContractBackend, domain string) (*AuctionRegistrar, error) {
address, err := RegistrarContractAddress(backend, domain)
if err != nil {
return nil, err
}
return NewAuctionRegistrarAt(backend, domain, address)
}
// NewAuctionRegistrarAt creates an auction registrar for a given domain at a given address.
func NewAuctionRegistrarAt(backend bind.ContractBackend, domain string, address common.Address) (*AuctionRegistrar, error) {
contract, err := auctionregistrar.NewContract(address, backend)
if err != nil {
return nil, err
}
return &AuctionRegistrar{
backend: backend,
domain: domain,
Contract: contract,
ContractAddr: address,
}, nil
}
// State returns the state of a name.
func (r *AuctionRegistrar) State(name string) (string, error) {
entry, err := r.Entry(name)
if err != nil {
return "", err
}
if entry == nil {
return "", fmt.Errorf("no entry for %s", name)
}
return entry.State, nil
}
// Entry obtains a registrar entry for a name.
func (r *AuctionRegistrar) Entry(domain string) (*AuctionEntry, error) {
name, err := UnqualifiedName(domain, r.domain)
if err != nil {
return nil, fmt.Errorf("invalid name %s", domain)
}
labelHash, err := LabelHash(name)
if err != nil {
return nil, err
}
status, deedAddress, registration, value, highestBid, err := r.Contract.Entries(nil, labelHash)
if err != nil {
return nil, err
}
entry := &AuctionEntry{
Deed: deedAddress,
Value: value,
HighestBid: highestBid,
}
entry.Registration = time.Unix(registration.Int64(), 0)
switch status {
case 0:
entry.State = "Available"
case 1:
entry.State = "Bidding"
case 2:
// Might be won or owned.
registry, err := NewRegistry(r.backend)
if err != nil {
return nil, err
}
owner, err := registry.Owner(domain)
if err != nil {
return nil, err
}
if owner == UnknownAddress {
entry.State = "Won"
} else {
entry.State = "Owned"
}
case 3:
entry.State = "Forbidden"
case 4:
entry.State = "Revealing"
case 5:
entry.State = "Unavailable"
default:
entry.State = "Unknown"
}
return entry, nil
}
// Migrate migrates a domain to the permanent registrar.
func (r *AuctionRegistrar) Migrate(opts *bind.TransactOpts, domain string) (*types.Transaction, error) {
name, err := UnqualifiedName(domain, r.domain)
if err != nil {
return nil, fmt.Errorf("invalid name %s", domain)
}
labelHash, err := LabelHash(name)
if err != nil {
return nil, err
}
return r.Contract.TransferRegistrars(opts, labelHash)
}
// Release releases a domain.
func (r *AuctionRegistrar) Release(opts *bind.TransactOpts, domain string) (*types.Transaction, error) {
name, err := UnqualifiedName(domain, r.domain)
if err != nil {
return nil, fmt.Errorf("invalid name %s", domain)
}
labelHash, err := LabelHash(name)
if err != nil {
return nil, err
}
return r.Contract.ReleaseDeed(opts, labelHash)
}
// Owner obtains the owner of the deed that represents the name.
func (r *AuctionRegistrar) Owner(domain string) (common.Address, error) {
name, err := UnqualifiedName(domain, r.domain)
if err != nil {
return UnknownAddress, err
}
entry, err := r.Entry(name)
if err != nil {
return UnknownAddress, err
}
deed, err := NewDeedAt(r.backend, entry.Deed)
if err != nil {
return UnknownAddress, err
}
return deed.Owner()
}
// SetOwner sets the owner of the deed that represents the name.
func (r *AuctionRegistrar) SetOwner(opts *bind.TransactOpts, domain string, address common.Address) (*types.Transaction, error) {
name, err := UnqualifiedName(domain, r.domain)
if err != nil {
return nil, fmt.Errorf("invalid name %s", domain)
}
labelHash, err := LabelHash(name)
if err != nil {
return nil, err
}
return r.Contract.Transfer(opts, labelHash, address)
}
// ShaBid calculates the hash for a bid.
func (r *AuctionRegistrar) ShaBid(hash [32]byte, address common.Address, value *big.Int, salt [32]byte) ([32]byte, error) {
return r.Contract.ShaBid(nil, hash, address, value, salt)
}