forked from osmosis-labs/osmosis
/
tree.go
101 lines (86 loc) · 2.27 KB
/
tree.go
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package v101
import (
"encoding/binary"
"encoding/json"
"fmt"
"github.com/gogo/protobuf/proto"
stypes "github.com/cosmos/cosmos-sdk/store/types"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/Anmol1696/osmosis/v11/store"
)
type Child struct {
Index []byte
Acc sdk.Int
}
type Children []Child // branch nodes
func migrateBranchValue(oldValueBz []byte) *store.Node {
var oldValue Children
fmt.Println(string(oldValueBz))
err := json.Unmarshal(oldValueBz, &oldValue)
if err != nil {
panic(err)
}
cs := make([]*store.Child, len(oldValue))
for i, oldChild := range oldValue {
cs[i] = &store.Child{Index: oldChild.Index, Accumulation: oldChild.Acc}
}
return &store.Node{Children: cs}
}
func migrateLeafValue(index []byte, oldValueBz []byte) *store.Leaf {
oldValue := sdk.ZeroInt()
err := json.Unmarshal(oldValueBz, &oldValue)
if err != nil {
panic(err)
}
return store.NewLeaf(index, oldValue)
}
func nodeKey(level uint16, key []byte) []byte {
bz := make([]byte, 2)
binary.BigEndian.PutUint16(bz, level)
return append(append([]byte("node/"), bz...), key...)
}
func leafKey(key []byte) []byte {
return nodeKey(0, key)
}
func migrateTreeNode(store sdk.KVStore, level uint16, key []byte) {
if level == 0 {
migrateTreeLeaf(store, key)
} else {
migrateTreeBranch(store, level, key)
}
}
func migrateTreeBranch(store sdk.KVStore, level uint16, key []byte) {
keyBz := nodeKey(level, key)
oldValueBz := store.Get(keyBz)
fmt.Println("migrate", keyBz, string(oldValueBz), level)
newValue := migrateBranchValue(oldValueBz)
newValueBz, err := proto.Marshal(newValue)
if err != nil {
panic(err)
}
store.Set(keyBz, newValueBz)
for _, child := range newValue.Children {
migrateTreeNode(store, level-1, child.Index)
}
}
func migrateTreeLeaf(store sdk.KVStore, key []byte) {
keyBz := leafKey(key)
oldValueBz := store.Get(keyBz)
newValue := migrateLeafValue(key, oldValueBz)
newValueBz, err := proto.Marshal(newValue)
if err != nil {
panic(err)
}
store.Set(keyBz, newValueBz)
}
func MigrateTree(store sdk.KVStore) {
iter := stypes.KVStoreReversePrefixIterator(store, []byte("node/"))
defer iter.Close()
if !iter.Valid() {
return
}
keybz := iter.Key()[5:]
level := binary.BigEndian.Uint16(keybz[:2])
key := keybz[2:]
migrateTreeNode(store, level, key)
}