package counter import ( "encoding/binary" "fmt" "github.com/tendermint/abci/types" ) type CounterApplication struct { hashCount int txCount int serial bool } func NewCounterApplication(serial bool) *CounterApplication { return &CounterApplication{serial: serial} } func (app *CounterApplication) Info() types.ResponseInfo { return types.ResponseInfo{Data: fmt.Sprintf("{\"hashes\":%v,\"txs\":%v}", app.hashCount, app.txCount)} } func (app *CounterApplication) SetOption(key string, value string) (log string) { if key == "serial" && value == "on" { app.serial = true } return "" } func (app *CounterApplication) DeliverTx(tx []byte) types.Result { if app.serial { if len(tx) > 8 { return types.ErrEncodingError.SetLog(fmt.Sprintf("Max tx size is 8 bytes, got %d", len(tx))) } tx8 := make([]byte, 8) copy(tx8[len(tx8)-len(tx):], tx) txValue := binary.BigEndian.Uint64(tx8) if txValue != uint64(app.txCount) { return types.ErrBadNonce.SetLog(fmt.Sprintf("Invalid nonce. Expected %v, got %v", app.txCount, txValue)) } } app.txCount++ return types.OK } func (app *CounterApplication) CheckTx(tx []byte) types.Result { if app.serial { if len(tx) > 8 { return types.ErrEncodingError.SetLog(fmt.Sprintf("Max tx size is 8 bytes, got %d", len(tx))) } tx8 := make([]byte, 8) copy(tx8[len(tx8)-len(tx):], tx) txValue := binary.BigEndian.Uint64(tx8) if txValue < uint64(app.txCount) { return types.ErrBadNonce.SetLog(fmt.Sprintf("Invalid nonce. Expected >= %v, got %v", app.txCount, txValue)) } } return types.OK } func (app *CounterApplication) Commit() types.Result { app.hashCount++ if app.txCount == 0 { return types.OK } hash := make([]byte, 8) binary.BigEndian.PutUint64(hash, uint64(app.txCount)) return types.NewResultOK(hash, "") } func (app *CounterApplication) Query(query []byte) types.Result { queryStr := string(query) switch queryStr { case "hash": return types.NewResultOK(nil, fmt.Sprintf("%v", app.hashCount)) case "tx": return types.NewResultOK(nil, fmt.Sprintf("%v", app.txCount)) } return types.ErrUnknownRequest.SetLog(fmt.Sprintf("Invalid nonce. Expected hash or tx, got %v", queryStr)) }