eth, miner: retrieve mining state from live database (ethereum#25139)

* miner: retrieve mining state from live database

* eth/catalyst: ignore stale fcu events from cl

miner/miner.go

@@ -40,7 +40,6 @@ import (
 type Backend interface {
 	BlockChain() *core.BlockChain
 	TxPool() *core.TxPool
-	StateAtBlock(block *types.Block, reexec uint64, base *state.StateDB, checkLive bool, preferDisk bool) (statedb *state.StateDB, err error)
 }
 
 // Config is the configuration parameters of mining.

miner/worker.go

@@ -786,16 +786,6 @@ func (w *worker) makeEnv(parent *types.Block, header *types.Header, coinbase com
 	// Retrieve the parent state to execute on top and start a prefetcher for
 	// the miner to speed block sealing up a bit
 	state, err := w.chain.StateAtWithSharedPool(parent.Root())
-	if err != nil {
-		// Note since the sealing block can be created upon the arbitrary parent
-		// block, but the state of parent block may already be pruned, so the necessary
-		// state recovery is needed here in the future.
-		//
-		// The maximum acceptable reorg depth can be limited by the finalised block
-		// somehow. TODO(rjl493456442) fix the hard-coded number here later.
-		state, err = w.eth.StateAtBlock(parent, 1024, nil, false, false)
-		log.Warn("Recovered mining state", "root", parent.Root(), "err", err)
-	}
 	if err != nil {
 		return nil, err
 	}