PrefetchAccount

README.md

@@ -18,9 +18,9 @@ It's half geth, half of what I think truebit was supposed to be. When it's done,
 
 ## State Oracle API
 
-hash -> value such that hash(value) == hash
+Preimage(hash) -> value    # hash(value) == hash
 
-This works for the three types of state in ethereum, Accounts, Storage, and Code.
+PrefetchAccount, PrefetchStorage, PrefetchCode can be NOP in the VM
 
 ## License
 

minigeth/core/state/statedb.go

@@ -513,7 +513,7 @@ func (s *StateDB) getDeletedStateObject(addr common.Address) *stateObject {
 		if metrics.EnabledExpensive {
 			defer func(start time.Time) { s.AccountReads += time.Since(start) }(time.Now())
 		}
-		oracle.PrefetchAddress(s.db.BlockNumber, addr)
+		oracle.PrefetchAccount(s.db.BlockNumber, addr)
 		enc, err := s.trie.TryGet(addr.Bytes())
 		if err != nil {
 			s.setError(fmt.Errorf("getDeleteStateObject (%x) error: %v", addr.Bytes(), err))

minigeth/oracle/prefetch.go

@@ -110,7 +110,7 @@ func PrefetchStorage(blockNumber *big.Int, addr common.Address, skey common.Hash
 	}
 }
 
-func PrefetchAddress(blockNumber *big.Int, addr common.Address) {
+func PrefetchAccount(blockNumber *big.Int, addr common.Address) {
 	key := fmt.Sprintf("proof_%d_%s", blockNumber, addr)
 	if cached[key] {
 		return

minigeth/trie/database.go

@@ -34,7 +34,7 @@ func NewDatabase(header types.Header) Database {
 	triedb := Database{BlockNumber: header.Number, Root: header.Root}
 	//triedb.preimages = make(map[common.Hash][]byte)
 	fmt.Println("init database")
-	oracle.PrefetchAddress(header.Number, common.Address{})
+	oracle.PrefetchAccount(header.Number, common.Address{})
 
 	//panic("preseed")
 	return triedb