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core/types: deserialize receipt RLP based on list size

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This commit is contained in:
Péter Szilágyi 2017-07-04 18:14:14 +03:00
parent a301c75029
commit 50f71a5024
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GPG key ID: E9AE538CEDF8293D
1 changed files with 26 additions and 11 deletions
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37
core/types/receipt.go
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@ -87,27 +87,42 @@ func (r *Receipt) DecodeRLP(s *rlp.Stream) error {
if err != nil {
return err
}
// Attempt to deserialize into a Metropolis format
var metro metropolisReceiptRLP
if err = rlp.DecodeBytes(raw, &metro); err == nil { // Keep the error in the outer scope!
list, _, err := rlp.SplitList(raw)
if err != nil {
return err
}
items, err := rlp.CountValues(list)
if err != nil {
return err
}
// Deserialize based on the number of content items
switch items {
case 3:
// Metropolis receipts have 3 components
var metro metropolisReceiptRLP
if err := rlp.DecodeBytes(raw, &metro); err != nil {
return err
}
r.CumulativeGasUsed = metro.CumulativeGasUsed
r.Bloom = metro.Bloom
r.Logs = metro.Logs
return nil
}
// Metropolis deserialization failed, attempt homestead
var home homesteadReceiptRLP
if err = rlp.DecodeBytes(raw, &home); err == nil { // Keep the error in the outer scope!
case 4:
// Homestead receipts have 4 components
var home homesteadReceiptRLP
if err := rlp.DecodeBytes(raw, &home); err != nil {
return err
}
r.PostState = home.PostState[:]
r.CumulativeGasUsed = home.CumulativeGasUsed
r.Bloom = home.Bloom
r.Logs = home.Logs
return nil
default:
return fmt.Errorf("invalid receipt components: %v", items)
}
// All decoders failed, return the last error
return err
}
// String implements the Stringer interface.