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104 lines
3.0 KiB
104 lines
3.0 KiB
package counter
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import (
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"encoding/binary"
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"fmt"
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"github.com/tendermint/tendermint/abci/example/code"
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"github.com/tendermint/tendermint/abci/types"
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cmn "github.com/tendermint/tendermint/libs/common"
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)
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type CounterApplication struct {
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types.BaseApplication
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hashCount int
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txCount int
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serial bool
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}
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func NewCounterApplication(serial bool) *CounterApplication {
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return &CounterApplication{serial: serial}
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}
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func (app *CounterApplication) Info(req types.RequestInfo) types.ResponseInfo {
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return types.ResponseInfo{Data: cmn.Fmt("{\"hashes\":%v,\"txs\":%v}", app.hashCount, app.txCount)}
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}
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func (app *CounterApplication) SetOption(req types.RequestSetOption) types.ResponseSetOption {
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key, value := req.Key, req.Value
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if key == "serial" && value == "on" {
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app.serial = true
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} else {
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/*
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TODO Panic and have the ABCI server pass an exception.
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The client can call SetOptionSync() and get an `error`.
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return types.ResponseSetOption{
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Error: cmn.Fmt("Unknown key (%s) or value (%s)", key, value),
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}
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*/
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return types.ResponseSetOption{}
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}
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return types.ResponseSetOption{}
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}
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func (app *CounterApplication) DeliverTx(tx []byte) types.ResponseDeliverTx {
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if app.serial {
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if len(tx) > 8 {
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return types.ResponseDeliverTx{
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Code: code.CodeTypeEncodingError,
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Log: fmt.Sprintf("Max tx size is 8 bytes, got %d", len(tx))}
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}
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tx8 := make([]byte, 8)
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copy(tx8[len(tx8)-len(tx):], tx)
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txValue := binary.BigEndian.Uint64(tx8)
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if txValue != uint64(app.txCount) {
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return types.ResponseDeliverTx{
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Code: code.CodeTypeBadNonce,
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Log: fmt.Sprintf("Invalid nonce. Expected %v, got %v", app.txCount, txValue)}
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}
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}
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app.txCount++
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return types.ResponseDeliverTx{Code: code.CodeTypeOK}
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}
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func (app *CounterApplication) CheckTx(tx []byte) types.ResponseCheckTx {
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if app.serial {
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if len(tx) > 8 {
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return types.ResponseCheckTx{
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Code: code.CodeTypeEncodingError,
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Log: fmt.Sprintf("Max tx size is 8 bytes, got %d", len(tx))}
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}
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tx8 := make([]byte, 8)
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copy(tx8[len(tx8)-len(tx):], tx)
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txValue := binary.BigEndian.Uint64(tx8)
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if txValue < uint64(app.txCount) {
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return types.ResponseCheckTx{
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Code: code.CodeTypeBadNonce,
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Log: fmt.Sprintf("Invalid nonce. Expected >= %v, got %v", app.txCount, txValue)}
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}
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}
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return types.ResponseCheckTx{Code: code.CodeTypeOK}
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}
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func (app *CounterApplication) Commit() (resp types.ResponseCommit) {
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app.hashCount++
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if app.txCount == 0 {
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return types.ResponseCommit{}
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}
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hash := make([]byte, 8)
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binary.BigEndian.PutUint64(hash, uint64(app.txCount))
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return types.ResponseCommit{Data: hash}
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}
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func (app *CounterApplication) Query(reqQuery types.RequestQuery) types.ResponseQuery {
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switch reqQuery.Path {
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case "hash":
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return types.ResponseQuery{Value: []byte(cmn.Fmt("%v", app.hashCount))}
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case "tx":
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return types.ResponseQuery{Value: []byte(cmn.Fmt("%v", app.txCount))}
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default:
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return types.ResponseQuery{Log: cmn.Fmt("Invalid query path. Expected hash or tx, got %v", reqQuery.Path)}
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}
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}
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