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gcs/builder: remove extended filter

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In this commit, we remove the extended filter as it doesn't have a clear
use atm.
This commit is contained in:
Olaoluwa Osuntokun 2018-05-30 17:31:06 -07:00
parent 0ecd90b8d6
commit e993e6ce27
1 changed files with 0 additions and 40 deletions
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40
gcs/builder/builder.go
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@ -371,46 +371,6 @@ func BuildBasicFilter(block *wire.MsgBlock) (*gcs.Filter, error) {
return b.Build()
}
// BuildExtFilter builds an extended GCS filter from a block. An extended
// filter supplements a regular basic filter by include all the _witness_ data
// found within a block. This includes all the data pushes within any signature
// scripts as well as each element of an input's witness stack. Additionally,
// the _hashes_ of each transaction are also inserted into the filter.
func BuildExtFilter(block *wire.MsgBlock) (*gcs.Filter, error) {
blockHash := block.BlockHash()
b := WithKeyHash(&blockHash)
// If the filter had an issue with the specified key, then we force it
// to bubble up here by calling the Key() function.
_, err := b.Key()
if err != nil {
return nil, err
}
// In order to build an extended filter, we add the hash of each
// transaction as well as each piece of witness data included in both
// the sigScript and the witness stack of an input.
for i, tx := range block.Transactions {
// Skip the inputs for the coinbase transaction
if i != 0 {
// Next, for each input, we'll add the sigScript (if
// it's present), and also the witness stack (if it's
// present)
for _, txIn := range tx.TxIn {
if txIn.SignatureScript != nil {
b.AddScript(txIn.SignatureScript)
}
if len(txIn.Witness) != 0 {
b.AddWitness(txIn.Witness)
}
}
}
}
return b.Build()
}
// GetFilterHash returns the double-SHA256 of the filter.
func GetFilterHash(filter *gcs.Filter) (chainhash.Hash, error) {
filterData, err := filter.NBytes()