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package counter
import (
"encoding/binary"
"fmt"
"github.com/tendermint/tendermint/abci/example/code"
"github.com/tendermint/tendermint/abci/types"
)
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: fmt.Sprintf("{\"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: fmt.Sprintf("Unknown key (%s) or value (%s)", key, value),
}
*/
return types.ResponseSetOption{}
}
return types.ResponseSetOption{}
}
func (app *CounterApplication) DeliverTx(req types.RequestDeliverTx) types.ResponseDeliverTx {
if app.serial {
if len(req.Tx) > 8 {
return types.ResponseDeliverTx{
Code: code.CodeTypeEncodingError,
Log: fmt.Sprintf("Max tx size is 8 bytes, got %d", len(req.Tx))}
}
tx8 := make([]byte, 8)
copy(tx8[len(tx8)-len(req.Tx):], req.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(req types.RequestCheckTx) types.ResponseCheckTx {
if app.serial {
if len(req.Tx) > 8 {
return types.ResponseCheckTx{
Code: code.CodeTypeEncodingError,
Log: fmt.Sprintf("Max tx size is 8 bytes, got %d", len(req.Tx))}
}
tx8 := make([]byte, 8)
copy(tx8[len(tx8)-len(req.Tx):], req.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(fmt.Sprintf("%v", app.hashCount))}
case "tx":
return types.ResponseQuery{Value: []byte(fmt.Sprintf("%v", app.txCount))}
default:
return types.ResponseQuery{Log: fmt.Sprintf("Invalid query path. Expected hash or tx, got %v", reqQuery.Path)}
}
}
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