package state import ( "github.com/nspcc-dev/neo-go/pkg/io" "github.com/nspcc-dev/neo-go/pkg/util" ) // UnspentBalance contains input/output transactons that sum up into the // account balance for the given asset. type UnspentBalance struct { Tx util.Uint256 `json:"txid"` Index uint16 `json:"n"` Value util.Fixed8 `json:"value"` } // UnspentBalances is a slice of UnspentBalance (mostly needed to sort them). type UnspentBalances []UnspentBalance // Account represents the state of a NEO account. type Account struct { Version uint8 ScriptHash util.Uint160 IsFrozen bool Balances map[util.Uint256][]UnspentBalance } // NewAccount returns a new Account object. func NewAccount(scriptHash util.Uint160) *Account { return &Account{ Version: 0, ScriptHash: scriptHash, IsFrozen: false, Balances: make(map[util.Uint256][]UnspentBalance), } } // DecodeBinary decodes Account from the given BinReader. func (s *Account) DecodeBinary(br *io.BinReader) { s.Version = uint8(br.ReadB()) s.ScriptHash.DecodeBinary(br) s.IsFrozen = br.ReadBool() s.Balances = make(map[util.Uint256][]UnspentBalance) lenBalances := br.ReadVarUint() for i := 0; i < int(lenBalances); i++ { key := util.Uint256{} br.ReadBytes(key[:]) len := int(br.ReadVarUint()) ubs := make([]UnspentBalance, len) for j := 0; j < len; j++ { ubs[j].DecodeBinary(br) } s.Balances[key] = ubs } } // EncodeBinary encodes Account to the given BinWriter. func (s *Account) EncodeBinary(bw *io.BinWriter) { bw.WriteB(byte(s.Version)) s.ScriptHash.EncodeBinary(bw) bw.WriteBool(s.IsFrozen) bw.WriteVarUint(uint64(len(s.Balances))) for k, v := range s.Balances { bw.WriteBytes(k[:]) bw.WriteVarUint(uint64(len(v))) for i := range v { v[i].EncodeBinary(bw) } } } // DecodeBinary implements io.Serializable interface. func (u *UnspentBalance) DecodeBinary(r *io.BinReader) { u.Tx.DecodeBinary(r) u.Index = r.ReadU16LE() u.Value.DecodeBinary(r) } // EncodeBinary implements io.Serializable interface. func (u *UnspentBalance) EncodeBinary(w *io.BinWriter) { u.Tx.EncodeBinary(w) w.WriteU16LE(u.Index) u.Value.EncodeBinary(w) } // GetBalanceValues sums all unspent outputs and returns a map of asset IDs to // overall balances. func (s *Account) GetBalanceValues() map[util.Uint256]util.Fixed8 { res := make(map[util.Uint256]util.Fixed8) for k, v := range s.Balances { balance := util.Fixed8(0) for _, b := range v { balance += b.Value } res[k] = balance } return res } // Len returns the length of UnspentBalances (used to sort things). func (us UnspentBalances) Len() int { return len(us) } // Less compares two elements of UnspentBalances (used to sort things). func (us UnspentBalances) Less(i, j int) bool { return us[i].Value < us[j].Value } // Swap swaps two elements of UnspentBalances (used to sort things). func (us UnspentBalances) Swap(i, j int) { us[i], us[j] = us[j], us[i] }