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0be3044b7e
* rename * rename "make grpc" * rename "abi bindings templates" * rename "abi bindings templates"
64 lines
2.4 KiB
Go
64 lines
2.4 KiB
Go
// Copyright 2019 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 eth
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import (
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"github.com/ledgerwatch/erigon/common"
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"github.com/ledgerwatch/erigon/core/forkid"
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"github.com/ledgerwatch/erigon/core/types"
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"github.com/ledgerwatch/erigon/ethdb/remote/remotedbserver"
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"github.com/ledgerwatch/erigon/p2p/enode"
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"github.com/ledgerwatch/erigon/params"
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"github.com/ledgerwatch/erigon/rlp"
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)
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// enrEntry is the ENR entry which advertises `eth` protocol on the discovery.
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type enrEntry struct {
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ForkID forkid.ID // Fork identifier per EIP-2124
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// Ignore additional fields (for forward compatibility).
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Rest []rlp.RawValue `rlp:"tail"`
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}
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// ENRKey implements enr.Entry.
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func (e enrEntry) ENRKey() string {
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return "eth"
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}
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// StartENRUpdater starts the `eth` ENR updater loop, which listens for chain
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// head events and updates the requested node record whenever a fork is passed.
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func StartENRUpdater(chainConfig *params.ChainConfig, genesisHash common.Hash, events *remotedbserver.Events, ln *enode.LocalNode) {
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events.AddHeaderSubscription(func(h *types.Header) error {
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ln.Set(CurrentENREntry(chainConfig, genesisHash, h.Number.Uint64()))
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return nil
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})
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}
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// CurrentENREntry constructs an `eth` ENR entry based on the current state of the chain.
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func CurrentENREntry(chainConfig *params.ChainConfig, genesisHash common.Hash, headHeight uint64) *enrEntry {
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return &enrEntry{
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ForkID: forkid.NewID(chainConfig, genesisHash, headHeight),
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}
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}
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// CurrentENREntryFromForks constructs an `eth` ENR entry based on the current state of the chain.
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func CurrentENREntryFromForks(forks []uint64, genesisHash common.Hash, headHeight uint64) *enrEntry {
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return &enrEntry{
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ForkID: forkid.NewIDFromForks(forks, genesisHash, headHeight),
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}
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}
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