cerc-io/eth-iterator-utils
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fill nodeiterator interface

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This commit is contained in:
Roy Crihfield 2020-09-06 02:28:36 -05:00
parent a3595be72b
commit 8b8f718505
1 changed files with 20 additions and 17 deletions
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37
pkg/iterator/iterator.go
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@ -25,21 +25,12 @@ import (
"github.com/ethereum/go-ethereum/trie" "github.com/ethereum/go-ethereum/trie"
) )
// Simplified trie node iterator type PrefixBoundIterator struct {
type NodeIterator interface {
Next(bool) bool
Error() error
Hash() common.Hash
Path() []byte
Leaf() bool
}
type prefixBoundIterator struct {
current trie.NodeIterator current trie.NodeIterator
endKey []byte endKey []byte
} }
func (it *prefixBoundIterator) Next(descend bool) bool { func (it *PrefixBoundIterator) Next(descend bool) bool {
if it.endKey == nil { if it.endKey == nil {
return it.current.Next(descend) return it.current.Next(descend)
} }
@ -50,22 +41,34 @@ func (it *prefixBoundIterator) Next(descend bool) bool {
return it.current.Next(descend) return it.current.Next(descend)
} }
func (it *prefixBoundIterator) Error() error { func (it *PrefixBoundIterator) Error() error {
return it.current.Error() return it.current.Error()
} }
func (it *prefixBoundIterator) Hash() common.Hash { func (it *PrefixBoundIterator) Hash() common.Hash {
return it.current.Hash() return it.current.Hash()
} }
func (it *prefixBoundIterator) Path() []byte { func (it *PrefixBoundIterator) Path() []byte {
return it.current.Path() return it.current.Path()
} }
func (it *prefixBoundIterator) Leaf() bool { func (it *PrefixBoundIterator) Leaf() bool {
return it.current.Leaf() return it.current.Leaf()
} }
func (it *PrefixBoundIterator) LeafKey() []byte {
return it.current.LeafKey()
}
func (it *PrefixBoundIterator) LeafBlob() []byte {
return it.current.LeafBlob()
}
func (it *PrefixBoundIterator) LeafProof() [][]byte {
return it.current.LeafProof()
}
func (it *PrefixBoundIterator) Parent() common.Hash {
return it.current.Parent()
}
// Iterator with an upper bound value (hex path prefix) // Iterator with an upper bound value (hex path prefix)
func NewPrefixBoundIterator(it trie.NodeIterator, to []byte) NodeIterator { func NewPrefixBoundIterator(it trie.NodeIterator, to []byte) *PrefixBoundIterator {
return &prefixBoundIterator{current: it, endKey: to} return &PrefixBoundIterator{current: it, endKey: to}
} }
type prefixGenerator struct { type prefixGenerator struct {