package counter import ( "encoding/binary" "fmt" "github.com/tendermint/tendermint/abci/example/code" "github.com/tendermint/tendermint/abci/types" cmn "github.com/tendermint/tendermint/libs/common" ) type CounterApplication struct { types.BaseApplication hashCount int txCount int serial bool } func NewCounterApplication(serial bool) *CounterApplication { return &CounterApplication{serial: serial} } func (app *CounterApplication) Info(req types.RequestInfo) types.ResponseInfo { return types.ResponseInfo{Data: cmn.Fmt("{\"hashes\":%v,\"txs\":%v}", app.hashCount, app.txCount)} } func (app *CounterApplication) SetOption(req types.RequestSetOption) types.ResponseSetOption { key, value := req.Key, req.Value if key == "serial" && value == "on" { app.serial = true } else { /* TODO Panic and have the ABCI server pass an exception. The client can call SetOptionSync() and get an `error`. return types.ResponseSetOption{ Error: cmn.Fmt("Unknown key (%s) or value (%s)", key, value), } */ return types.ResponseSetOption{} } return types.ResponseSetOption{} } func (app *CounterApplication) DeliverTx(tx []byte) types.ResponseDeliverTx { if app.serial { if len(tx) > 8 { return types.ResponseDeliverTx{ Code: code.CodeTypeEncodingError, Log: 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.ResponseDeliverTx{ Code: code.CodeTypeBadNonce, Log: fmt.Sprintf("Invalid nonce. Expected %v, got %v", app.txCount, txValue)} } } app.txCount++ return types.ResponseDeliverTx{Code: code.CodeTypeOK} } func (app *CounterApplication) CheckTx(tx []byte) types.ResponseCheckTx { if app.serial { if len(tx) > 8 { return types.ResponseCheckTx{ Code: code.CodeTypeEncodingError, Log: 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.ResponseCheckTx{ Code: code.CodeTypeBadNonce, Log: fmt.Sprintf("Invalid nonce. Expected >= %v, got %v", app.txCount, txValue)} } } return types.ResponseCheckTx{Code: code.CodeTypeOK} } func (app *CounterApplication) Commit() (resp types.ResponseCommit) { app.hashCount++ if app.txCount == 0 { return types.ResponseCommit{} } hash := make([]byte, 8) binary.BigEndian.PutUint64(hash, uint64(app.txCount)) return types.ResponseCommit{Data: hash} } func (app *CounterApplication) Query(reqQuery types.RequestQuery) types.ResponseQuery { switch reqQuery.Path { case "hash": return types.ResponseQuery{Value: []byte(cmn.Fmt("%v", app.hashCount))} case "tx": return types.ResponseQuery{Value: []byte(cmn.Fmt("%v", app.txCount))} default: return types.ResponseQuery{Log: cmn.Fmt("Invalid query path. Expected hash or tx, got %v", reqQuery.Path)} } }