func (m *RadixMap) walk(f WalkFunc, key data.Hash256, depth uint8, fill bool) error {
if key.IsZero() {
return nil
}
var node *RadixNode
if fill {
var err error
node = &RadixNode{
Depth: depth,
}
node.Node, err = m.db.Get(key)
if err != nil {
return err
}
m.nodes[key] = node
} else {
var ok bool
node, ok = m.nodes[key]
if !ok {
return fmt.Errorf("Missing hash: %s", key.String())
}
if err := f(key, node); err != nil {
return err
}
}
inner, ok := node.Node.(*data.InnerNode)
if !ok {
return nil
}
return inner.Each(func(pos int, child data.Hash256) error {
return m.walk(f, child, depth+1, fill)
})
}
func NewLedgerStateFromDB(hash data.Hash256, db storage.NodeDB) (*LedgerState, error) {
node, err := db.Get(hash)
if err != nil {
return nil, err
}
ledger, ok := node.(*data.Ledger)
if !ok {
return nil, fmt.Errorf("NewLedgerStateFromDB: not a ledger:%s", hash.String())
}
return &LedgerState{
Ledger: ledger,
AccountState: NewRadixMap(ledger.StateHash, db),
Transactions: NewRadixMap(ledger.TransactionHash, db),
Books: make(map[CurrencyPair]Offers),
}, nil
}