plugeth/core/rawdb/plugin_hooks.go
Austin Roberts 627f95403f Pass loop variable to defer function
The loop variable changes before the defer executes, so we need to
pass it to the function to make sure the closure has the correct
version of the loop variable.
2022-01-07 13:58:39 -06:00

121 lines
3.0 KiB
Go

package rawdb
import (
"github.com/ethereum/go-ethereum/plugins"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/rlp"
"sync"
)
var (
freezerUpdates map[uint64]map[string]interface{}
lock sync.Mutex
)
func PluginTrackUpdate(num uint64, kind string, value interface{}) {
lock.Lock()
defer lock.Unlock()
if freezerUpdates == nil { freezerUpdates = make(map[uint64]map[string]interface{}) }
update, ok := freezerUpdates[num]
if !ok {
update = make(map[string]interface{})
freezerUpdates[num] = update
}
update[kind] = value
}
func pluginCommitUpdate(num uint64) {
if plugins.DefaultPluginLoader == nil {
log.Warn("Attempting CommitUpdate, but default PluginLoader has not been initialized")
return
}
PluginCommitUpdate(plugins.DefaultPluginLoader, num)
}
func PluginCommitUpdate(pl *plugins.PluginLoader, num uint64) {
lock.Lock()
defer lock.Unlock()
if freezerUpdates == nil { freezerUpdates = make(map[uint64]map[string]interface{}) }
min := ^uint64(0)
for i := range freezerUpdates{
if min > i { min = i }
}
for i := min ; i < num; i++ {
update, ok := freezerUpdates[i]
defer func(i uint64) { delete(freezerUpdates, i) }(i)
if !ok {
log.Warn("Attempting to commit untracked block", "num", i)
continue
}
fnList := pl.Lookup("ModifyAncients", func(item interface{}) bool {
_, ok := item.(func(uint64, map[string]interface{}))
return ok
})
for _, fni := range fnList {
if fn, ok := fni.(func(uint64, map[string]interface{})); ok {
fn(i, update)
}
}
appendAncientFnList := pl.Lookup("AppendAncient", func(item interface{}) bool {
_, ok := item.(func(number uint64, hash, header, body, receipts, td []byte))
if ok { log.Warn("PlugEth's AppendAncient is deprecated. Please update to ModifyAncients.") }
return ok
})
if len(appendAncientFnList) > 0 {
var (
hash []byte
header []byte
body []byte
receipts []byte
td []byte
)
if hashi, ok := update[freezerHashTable]; ok {
switch v := hashi.(type) {
case []byte:
hash = v
default:
hash, _ = rlp.EncodeToBytes(v)
}
}
if headeri, ok := update[freezerHeaderTable]; ok {
switch v := headeri.(type) {
case []byte:
header = v
default:
header, _ = rlp.EncodeToBytes(v)
}
}
if bodyi, ok := update[freezerBodiesTable]; ok {
switch v := bodyi.(type) {
case []byte:
body = v
default:
body, _ = rlp.EncodeToBytes(v)
}
}
if receiptsi, ok := update[freezerReceiptTable]; ok {
switch v := receiptsi.(type) {
case []byte:
receipts = v
default:
receipts, _ = rlp.EncodeToBytes(v)
}
}
if tdi, ok := update[freezerDifficultyTable]; ok {
switch v := tdi.(type) {
case []byte:
td = v
default:
td, _ = rlp.EncodeToBytes(v)
}
}
for _, fni := range appendAncientFnList {
if fn, ok := fni.(func(number uint64, hash, header, body, receipts, td []byte)); ok {
fn(i, hash, header, body, receipts, td)
}
}
}
}
}