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refactor: remove unused unconfirmed.go (#972)

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Ömer Faruk Irmak 2024-08-12 13:08:42 +03:00 committed by GitHub
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commit 4464f48a5d
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136
miner/unconfirmed.go
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@ -1,136 +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 miner
import (
"container/ring"
"sync"
"github.com/scroll-tech/go-ethereum/common"
"github.com/scroll-tech/go-ethereum/core/types"
"github.com/scroll-tech/go-ethereum/log"
)
// chainRetriever is used by the unconfirmed block set to verify whether a previously
// mined block is part of the canonical chain or not.
type chainRetriever interface {
// GetHeaderByNumber retrieves the canonical header associated with a block number.
GetHeaderByNumber(number uint64) *types.Header
// GetBlockByNumber retrieves the canonical block associated with a block number.
GetBlockByNumber(number uint64) *types.Block
}
// unconfirmedBlock is a small collection of metadata about a locally mined block
// that is placed into a unconfirmed set for canonical chain inclusion tracking.
type unconfirmedBlock struct {
index uint64
hash common.Hash
}
// unconfirmedBlocks implements a data structure to maintain locally mined blocks
// have not yet reached enough maturity to guarantee chain inclusion. It is
// used by the miner to provide logs to the user when a previously mined block
// has a high enough guarantee to not be reorged out of the canonical chain.
type unconfirmedBlocks struct {
chain chainRetriever // Blockchain to verify canonical status through
depth uint // Depth after which to discard previous blocks
blocks *ring.Ring // Block infos to allow canonical chain cross checks
lock sync.Mutex // Protects the fields from concurrent access
}
// newUnconfirmedBlocks returns new data structure to track currently unconfirmed blocks.
func newUnconfirmedBlocks(chain chainRetriever, depth uint) *unconfirmedBlocks {
return &unconfirmedBlocks{
chain: chain,
depth: depth,
}
}
// Insert adds a new block to the set of unconfirmed ones.
func (set *unconfirmedBlocks) Insert(index uint64, hash common.Hash) {
// If a new block was mined locally, shift out any old enough blocks
set.Shift(index)
// Create the new item as its own ring
item := ring.New(1)
item.Value = &unconfirmedBlock{
index: index,
hash: hash,
}
// Set as the initial ring or append to the end
set.lock.Lock()
defer set.lock.Unlock()
if set.blocks == nil {
set.blocks = item
} else {
set.blocks.Move(-1).Link(item)
}
// Display a log for the user to notify of a new mined block unconfirmed
log.Info("🔨 mined potential block", "number", index, "hash", hash)
}
// Shift drops all unconfirmed blocks from the set which exceed the unconfirmed sets depth
// allowance, checking them against the canonical chain for inclusion or staleness
// report.
func (set *unconfirmedBlocks) Shift(height uint64) {
set.lock.Lock()
defer set.lock.Unlock()
for set.blocks != nil {
// Retrieve the next unconfirmed block and abort if too fresh
next := set.blocks.Value.(*unconfirmedBlock)
if next.index+uint64(set.depth) > height {
break
}
// Block seems to exceed depth allowance, check for canonical status
header := set.chain.GetHeaderByNumber(next.index)
switch {
case header == nil:
log.Warn("Failed to retrieve header of mined block", "number", next.index, "hash", next.hash)
case header.Hash() == next.hash:
log.Info("🔗 block reached canonical chain", "number", next.index, "hash", next.hash)
default:
// Block is not canonical, check whether we have an uncle or a lost block
included := false
for number := next.index; !included && number < next.index+uint64(set.depth) && number <= height; number++ {
if block := set.chain.GetBlockByNumber(number); block != nil {
for _, uncle := range block.Uncles() {
if uncle.Hash() == next.hash {
included = true
break
}
}
}
}
if included {
log.Info("⑂ block became an uncle", "number", next.index, "hash", next.hash)
} else {
log.Info("😱 block lost", "number", next.index, "hash", next.hash)
}
}
// Drop the block out of the ring
if set.blocks.Value == set.blocks.Next().Value {
set.blocks = nil
} else {
set.blocks = set.blocks.Move(-1)
set.blocks.Unlink(1)
set.blocks = set.blocks.Move(1)
}
}
}

87
miner/unconfirmed_test.go
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@ -1,87 +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 miner
import (
"testing"
"github.com/scroll-tech/go-ethereum/core/types"
)
// noopChainRetriever is an implementation of headerRetriever that always
// returns nil for any requested headers.
type noopChainRetriever struct{}
func (r *noopChainRetriever) GetHeaderByNumber(number uint64) *types.Header {
return nil
}
func (r *noopChainRetriever) GetBlockByNumber(number uint64) *types.Block {
return nil
}
// Tests that inserting blocks into the unconfirmed set accumulates them until
// the desired depth is reached, after which they begin to be dropped.
func TestUnconfirmedInsertBounds(t *testing.T) {
limit := uint(10)
pool := newUnconfirmedBlocks(new(noopChainRetriever), limit)
for depth := uint64(0); depth < 2*uint64(limit); depth++ {
// Insert multiple blocks for the same level just to stress it
for i := 0; i < int(depth); i++ {
pool.Insert(depth, [32]byte{byte(depth), byte(i)})
}
// Validate that no blocks below the depth allowance are left in
pool.blocks.Do(func(block interface{}) {
if block := block.(*unconfirmedBlock); block.index+uint64(limit) <= depth {
t.Errorf("depth %d: block %x not dropped", depth, block.hash)
}
})
}
}
// Tests that shifting blocks out of the unconfirmed set works both for normal
// cases as well as for corner cases such as empty sets, empty shifts or full
// shifts.
func TestUnconfirmedShifts(t *testing.T) {
// Create a pool with a few blocks on various depths
limit, start := uint(10), uint64(25)
pool := newUnconfirmedBlocks(new(noopChainRetriever), limit)
for depth := start; depth < start+uint64(limit); depth++ {
pool.Insert(depth, [32]byte{byte(depth)})
}
// Try to shift below the limit and ensure no blocks are dropped
pool.Shift(start + uint64(limit) - 1)
if n := pool.blocks.Len(); n != int(limit) {
t.Errorf("unconfirmed count mismatch: have %d, want %d", n, limit)
}
// Try to shift half the blocks out and verify remainder
pool.Shift(start + uint64(limit) - 1 + uint64(limit/2))
if n := pool.blocks.Len(); n != int(limit)/2 {
t.Errorf("unconfirmed count mismatch: have %d, want %d", n, limit/2)
}
// Try to shift all the remaining blocks out and verify emptyness
pool.Shift(start + 2*uint64(limit))
if n := pool.blocks.Len(); n != 0 {
t.Errorf("unconfirmed count mismatch: have %d, want %d", n, 0)
}
// Try to shift out from the empty set and make sure it doesn't break
pool.Shift(start + 3*uint64(limit))
if n := pool.blocks.Len(); n != 0 {
t.Errorf("unconfirmed count mismatch: have %d, want %d", n, 0)
}
}