eth: enforce announcement metadatas and drop peers violating the protocol (#28261)

* eth: enforce announcement metadatas and drop peers violating the protocol

* eth/fetcher: relax eth/68 validation a bit for flakey clients

* tests/fuzzers/txfetcher: pull in suggestion from Marius

* eth/fetcher: add tests for peer dropping

* eth/fetcher: linter linter linter linter linter

tests/fuzzers/txfetcher/txfetcher_fuzzer.go

@@ -83,6 +83,7 @@ func Fuzz(input []byte) int {
 			return make([]error, len(txs))
 		},
 		func(string, []common.Hash) error { return nil },
+		nil,
 		clock, rand,
 	)
 	f.Start()
@@ -116,6 +117,8 @@ func Fuzz(input []byte) int {
 			var (
 				announceIdxs = make([]int, announce)
 				announces    = make([]common.Hash, announce)
+				types        = make([]byte, announce)
+				sizes        = make([]uint32, announce)
 			)
 			for i := 0; i < len(announces); i++ {
 				annBuf := make([]byte, 2)
@@ -124,11 +127,13 @@ func Fuzz(input []byte) int {
 				}
 				announceIdxs[i] = (int(annBuf[0])*256 + int(annBuf[1])) % len(txs)
 				announces[i] = txs[announceIdxs[i]].Hash()
+				types[i] = txs[announceIdxs[i]].Type()
+				sizes[i] = uint32(txs[announceIdxs[i]].Size())
 			}
 			if verbose {
 				fmt.Println("Notify", peer, announceIdxs)
 			}
-			if err := f.Notify(peer, announces); err != nil {
+			if err := f.Notify(peer, types, sizes, announces); err != nil {
 				panic(err)
 			}