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package counter
import (
"encoding/binary"
. "github.com/tendermint/go-common"
"github.com/tendermint/tmsp/types"
)
type CounterApplication struct {
hashCount int
txCount int
serial bool
}
func NewCounterApplication(serial bool) *CounterApplication {
return &CounterApplication{serial: serial}
}
func (app *CounterApplication) Info() (string, *types.TMSPInfo, *types.LastBlockInfo, *types.ConfigInfo) {
return Fmt("{\"hashes\":%v,\"txs\":%v}", app.hashCount, app.txCount), nil, nil, nil
}
func (app *CounterApplication) SetOption(key string, value string) (log string) {
if key == "serial" && value == "on" {
app.serial = true
}
return ""
}
func (app *CounterApplication) AppendTx(tx []byte) types.Result {
if app.serial {
if len(tx) > 8 {
return types.ErrEncodingError.SetLog(Fmt("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("Invalid nonce. Expected %v, got %v", app.txCount, txValue))
}
}
app.txCount += 1
return types.OK
}
func (app *CounterApplication) CheckTx(tx []byte) types.Result {
if app.serial {
if len(tx) > 8 {
return types.ErrEncodingError.SetLog(Fmt("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("Invalid nonce. Expected >= %v, got %v", app.txCount, txValue))
}
}
return types.OK
}
func (app *CounterApplication) Commit() types.Result {
app.hashCount += 1
if app.txCount == 0 {
return types.OK
} else {
hash := make([]byte, 8)
binary.BigEndian.PutUint64(hash, uint64(app.txCount))
return types.NewResultOK(hash, "")
}
}
func (app *CounterApplication) Query(query []byte) types.Result {
return types.NewResultOK(nil, Fmt("Query is not supported"))
}