diff options
Diffstat (limited to 'contracts/ens/ens.go')
-rw-r--r-- | contracts/ens/ens.go | 263 |
1 files changed, 0 insertions, 263 deletions
diff --git a/contracts/ens/ens.go b/contracts/ens/ens.go deleted file mode 100644 index 6fed172dc..000000000 --- a/contracts/ens/ens.go +++ /dev/null @@ -1,263 +0,0 @@ -// Copyright 2016 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. - -package ens - -//go:generate abigen --sol contract/ENS.sol --pkg contract --out contract/ens.go -//go:generate abigen --sol contract/ENSRegistry.sol --exc contract/ENS.sol:ENS --pkg contract --out contract/ensregistry.go -//go:generate abigen --sol contract/FIFSRegistrar.sol --exc contract/ENS.sol:ENS --pkg contract --out contract/fifsregistrar.go -//go:generate abigen --sol contract/PublicResolver.sol --exc contract/ENS.sol:ENS --pkg contract --out contract/publicresolver.go - -import ( - "encoding/binary" - "strings" - - "github.com/ethereum/go-ethereum/accounts/abi/bind" - "github.com/ethereum/go-ethereum/common" - "github.com/ethereum/go-ethereum/contracts/ens/contract" - "github.com/ethereum/go-ethereum/contracts/ens/fallback_contract" - "github.com/ethereum/go-ethereum/core/types" - "github.com/ethereum/go-ethereum/crypto" -) - -var ( - MainNetAddress = common.HexToAddress("0x314159265dD8dbb310642f98f50C066173C1259b") - TestNetAddress = common.HexToAddress("0x112234455c3a32fd11230c42e7bccd4a84e02010") - contentHash_Interface_Id [4]byte -) - -const contentHash_Interface_Id_Spec = 0xbc1c58d1 - -func init() { - binary.BigEndian.PutUint32(contentHash_Interface_Id[:], contentHash_Interface_Id_Spec) -} - -// ENS is the swarm domain name registry and resolver -type ENS struct { - *contract.ENSSession - contractBackend bind.ContractBackend -} - -// NewENS creates a struct exposing convenient high-level operations for interacting with -// the Ethereum Name Service. -func NewENS(transactOpts *bind.TransactOpts, contractAddr common.Address, contractBackend bind.ContractBackend) (*ENS, error) { - ens, err := contract.NewENS(contractAddr, contractBackend) - if err != nil { - return nil, err - } - return &ENS{ - &contract.ENSSession{ - Contract: ens, - TransactOpts: *transactOpts, - }, - contractBackend, - }, nil -} - -// DeployENS deploys an instance of the ENS nameservice, with a 'first-in, first-served' root registrar. -func DeployENS(transactOpts *bind.TransactOpts, contractBackend bind.ContractBackend) (common.Address, *ENS, error) { - // Deploy the ENS registry - ensAddr, _, _, err := contract.DeployENSRegistry(transactOpts, contractBackend) - if err != nil { - return ensAddr, nil, err - } - ens, err := NewENS(transactOpts, ensAddr, contractBackend) - if err != nil { - return ensAddr, nil, err - } - // Deploy the registrar - regAddr, _, _, err := contract.DeployFIFSRegistrar(transactOpts, contractBackend, ensAddr, [32]byte{}) - if err != nil { - return ensAddr, nil, err - } - // Set the registrar as owner of the ENS root - if _, err = ens.SetOwner([32]byte{}, regAddr); err != nil { - return ensAddr, nil, err - } - return ensAddr, ens, nil -} - -func ensParentNode(name string) (common.Hash, common.Hash) { - parts := strings.SplitN(name, ".", 2) - label := crypto.Keccak256Hash([]byte(parts[0])) - if len(parts) == 1 { - return [32]byte{}, label - } - parentNode, parentLabel := ensParentNode(parts[1]) - return crypto.Keccak256Hash(parentNode[:], parentLabel[:]), label -} - -func EnsNode(name string) common.Hash { - parentNode, parentLabel := ensParentNode(name) - return crypto.Keccak256Hash(parentNode[:], parentLabel[:]) -} - -func (ens *ENS) getResolver(node [32]byte) (*contract.PublicResolverSession, error) { - resolverAddr, err := ens.Resolver(node) - if err != nil { - return nil, err - } - resolver, err := contract.NewPublicResolver(resolverAddr, ens.contractBackend) - if err != nil { - return nil, err - } - return &contract.PublicResolverSession{ - Contract: resolver, - TransactOpts: ens.TransactOpts, - }, nil -} - -func (ens *ENS) getFallbackResolver(node [32]byte) (*fallback_contract.PublicResolverSession, error) { - resolverAddr, err := ens.Resolver(node) - if err != nil { - return nil, err - } - resolver, err := fallback_contract.NewPublicResolver(resolverAddr, ens.contractBackend) - if err != nil { - return nil, err - } - return &fallback_contract.PublicResolverSession{ - Contract: resolver, - TransactOpts: ens.TransactOpts, - }, nil -} - -func (ens *ENS) getRegistrar(node [32]byte) (*contract.FIFSRegistrarSession, error) { - registrarAddr, err := ens.Owner(node) - if err != nil { - return nil, err - } - registrar, err := contract.NewFIFSRegistrar(registrarAddr, ens.contractBackend) - if err != nil { - return nil, err - } - return &contract.FIFSRegistrarSession{ - Contract: registrar, - TransactOpts: ens.TransactOpts, - }, nil -} - -// Resolve is a non-transactional call that returns the content hash associated with a name. -func (ens *ENS) Resolve(name string) (common.Hash, error) { - node := EnsNode(name) - - resolver, err := ens.getResolver(node) - if err != nil { - return common.Hash{}, err - } - - // IMPORTANT: The old contract is deprecated. This code should be removed latest on June 1st 2019 - supported, err := resolver.SupportsInterface(contentHash_Interface_Id) - if err != nil { - return common.Hash{}, err - } - - if !supported { - resolver, err := ens.getFallbackResolver(node) - if err != nil { - return common.Hash{}, err - } - ret, err := resolver.Content(node) - if err != nil { - return common.Hash{}, err - } - return common.BytesToHash(ret[:]), nil - } - - // END DEPRECATED CODE - - contentHash, err := resolver.Contenthash(node) - if err != nil { - return common.Hash{}, err - } - - return extractContentHash(contentHash) -} - -// Addr is a non-transactional call that returns the address associated with a name. -func (ens *ENS) Addr(name string) (common.Address, error) { - node := EnsNode(name) - - resolver, err := ens.getResolver(node) - if err != nil { - return common.Address{}, err - } - ret, err := resolver.Addr(node) - if err != nil { - return common.Address{}, err - } - return common.BytesToAddress(ret[:]), nil -} - -// SetAddress sets the address associated with a name. Only works if the caller -// owns the name, and the associated resolver implements a `setAddress` function. -func (ens *ENS) SetAddr(name string, addr common.Address) (*types.Transaction, error) { - node := EnsNode(name) - - resolver, err := ens.getResolver(node) - if err != nil { - return nil, err - } - opts := ens.TransactOpts - opts.GasLimit = 200000 - return resolver.Contract.SetAddr(&opts, node, addr) -} - -// Register registers a new domain name for the caller, making them the owner of the new name. -// Only works if the registrar for the parent domain implements the FIFS registrar protocol. -func (ens *ENS) Register(name string) (*types.Transaction, error) { - parentNode, label := ensParentNode(name) - registrar, err := ens.getRegistrar(parentNode) - if err != nil { - return nil, err - } - return registrar.Contract.Register(&ens.TransactOpts, label, ens.TransactOpts.From) -} - -// SetContentHash sets the content hash associated with a name. Only works if the caller -// owns the name, and the associated resolver implements a `setContenthash` function. -func (ens *ENS) SetContentHash(name string, hash []byte) (*types.Transaction, error) { - node := EnsNode(name) - - resolver, err := ens.getResolver(node) - if err != nil { - return nil, err - } - - opts := ens.TransactOpts - opts.GasLimit = 200000 - - // IMPORTANT: The old contract is deprecated. This code should be removed latest on June 1st 2019 - supported, err := resolver.SupportsInterface(contentHash_Interface_Id) - if err != nil { - return nil, err - } - - if !supported { - resolver, err := ens.getFallbackResolver(node) - if err != nil { - return nil, err - } - opts := ens.TransactOpts - opts.GasLimit = 200000 - var b [32]byte - copy(b[:], hash) - return resolver.Contract.SetContent(&opts, node, b) - } - - // END DEPRECATED CODE - return resolver.Contract.SetContenthash(&opts, node, hash) -} |