87 lines
1.8 KiB
Go
87 lines
1.8 KiB
Go
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package lightclient
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import (
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"fmt"
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"github.com/tendermint/tendermint/crypto/merkle"
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"github.com/tendermint/tendermint/crypto/tmhash"
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)
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//----------------------------------------
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// CommitID
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// CommitID contains the tree version number and its merkle root.
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type CommitID struct {
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Version int64
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Hash []byte
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}
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func (cid CommitID) IsZero() bool { //nolint
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return cid.Version == 0 && len(cid.Hash) == 0
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}
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func (cid CommitID) String() string {
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return fmt.Sprintf("CommitID{%v:%X}", cid.Hash, cid.Version)
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}
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//----------------------------------------
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// CommitInfo
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// NOTE: Keep CommitInfo a simple immutable struct.
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type CommitInfo struct {
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// Version
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Version int64
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// Store info for
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StoreInfos []StoreInfo
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}
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// Hash returns the simple merkle root hash of the stores sorted by name.
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func (ci CommitInfo) Hash() []byte {
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// TODO cache to ci.hash []byte
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m := make(map[string][]byte, len(ci.StoreInfos))
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for _, storeInfo := range ci.StoreInfos {
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m[storeInfo.Name] = storeInfo.Hash()
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}
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return merkle.SimpleHashFromMap(m)
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}
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func (ci CommitInfo) CommitID() CommitID {
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return CommitID{
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Version: ci.Version,
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Hash: ci.Hash(),
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}
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}
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//----------------------------------------
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// StoreInfo
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// StoreInfo contains the name and core reference for an
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// underlying store. It is the leaf of the rootMultiStores top
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// level simple merkle tree.
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type StoreInfo struct {
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Name string
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Core StoreCore
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}
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type StoreCore struct {
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// StoreType StoreType
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CommitID CommitID
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// ... maybe add more state
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}
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// Implements merkle.Hasher.
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func (si StoreInfo) Hash() []byte {
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// Doesn't write Name, since merkle.SimpleHashFromMap() will
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// include them via the keys.
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bz, _ := Cdc.MarshalBinaryLengthPrefixed(si.Core) // Does not error
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hasher := tmhash.New()
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_, err := hasher.Write(bz)
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if err != nil {
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// TODO: Handle with #870
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panic(err)
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}
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return hasher.Sum(nil)
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}
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