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54 lines
1.5 KiB
Go
54 lines
1.5 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package ethreg
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import (
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"math/big"
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"github.com/ethereum/go-ethereum/common/registrar"
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)
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type Backend interface {
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registrar.Backend
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AtStateNum(int64) registrar.Backend
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}
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// implements a versioned Registrar on an archiving full node
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type EthReg struct {
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backend Backend
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registry *registrar.Registrar
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}
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func New(backend Backend) (self *EthReg) {
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self = &EthReg{backend: backend}
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self.registry = registrar.New(backend)
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return
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}
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func (self *EthReg) Registry() *registrar.Registrar {
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return self.registry
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}
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func (self *EthReg) Resolver(n *big.Int) *registrar.Registrar {
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var s registrar.Backend
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if n != nil {
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s = self.backend.AtStateNum(n.Int64())
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} else {
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s = registrar.Backend(self.backend)
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}
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return registrar.New(s)
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}
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