296 lines
8.1 KiB
Go
296 lines
8.1 KiB
Go
package state
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import (
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"github.com/tendermint/basecoin/types"
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. "github.com/tendermint/go-common"
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"github.com/tendermint/go-events"
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tmsp "github.com/tendermint/tmsp/types"
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)
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// If the tx is invalid, a TMSP error will be returned.
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func ExecTx(state *State, pgz *types.Plugins, tx types.Tx, isCheckTx bool, evc events.Fireable) tmsp.Result {
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// TODO: do something with fees
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fees := types.Coins{}
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chainID := state.GetChainID()
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// Exec tx
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switch tx := tx.(type) {
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case *types.SendTx:
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// Validate inputs and outputs, basic
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res := validateInputsBasic(tx.Inputs)
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if res.IsErr() {
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return res.PrependLog("in validateInputsBasic()")
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}
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res = validateOutputsBasic(tx.Outputs)
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if res.IsErr() {
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return res.PrependLog("in validateOutputsBasic()")
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}
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// Get inputs
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accounts, res := getInputs(state, tx.Inputs)
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if res.IsErr() {
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return res.PrependLog("in getInputs()")
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}
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// Get or make outputs.
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accounts, res = getOrMakeOutputs(state, accounts, tx.Outputs)
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if res.IsErr() {
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return res.PrependLog("in getOrMakeOutputs()")
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}
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// Validate inputs and outputs, advanced
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signBytes := tx.SignBytes(chainID)
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inTotal, res := validateInputsAdvanced(accounts, signBytes, tx.Inputs)
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if res.IsErr() {
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return res.PrependLog("in validateInputsAdvanced()")
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}
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outTotal := sumOutputs(tx.Outputs)
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if !inTotal.IsEqual(outTotal.Plus(types.Coins{{"", tx.Fee}})) {
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return tmsp.ErrBaseInvalidOutput.AppendLog("Input total != output total + fees")
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}
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fees = fees.Plus(types.Coins{{"", tx.Fee}})
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// TODO: Fee validation for SendTx
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// Good! Adjust accounts
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adjustByInputs(state, accounts, tx.Inputs)
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adjustByOutputs(state, accounts, tx.Outputs, isCheckTx)
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/*
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// Fire events
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if !isCheckTx {
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if evc != nil {
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for _, i := range tx.Inputs {
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evc.FireEvent(types.EventStringAccInput(i.Address), types.EventDataTx{tx, nil, ""})
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}
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for _, o := range tx.Outputs {
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evc.FireEvent(types.EventStringAccOutput(o.Address), types.EventDataTx{tx, nil, ""})
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}
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}
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}
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*/
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return tmsp.OK
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case *types.AppTx:
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// Validate input, basic
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res := tx.Input.ValidateBasic()
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if res.IsErr() {
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return res
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}
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// Get input account
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inAcc := state.GetAccount(tx.Input.Address)
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if inAcc == nil {
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return tmsp.ErrBaseUnknownAddress
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}
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if tx.Input.PubKey != nil {
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inAcc.PubKey = tx.Input.PubKey
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}
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// Validate input, advanced
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signBytes := tx.SignBytes(chainID)
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res = validateInputAdvanced(inAcc, signBytes, tx.Input)
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if res.IsErr() {
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log.Info(Fmt("validateInputAdvanced failed on %X: %v", tx.Input.Address, res))
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return res.PrependLog("in validateInputAdvanced()")
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}
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if !tx.Input.Coins.IsGTE(types.Coins{{"", tx.Fee}}) {
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log.Info(Fmt("Sender did not send enough to cover the fee %X", tx.Input.Address))
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return tmsp.ErrBaseInsufficientFunds
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}
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// Validate call address
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plugin := pgz.GetByByte(tx.Type)
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if plugin == nil {
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return tmsp.ErrBaseUnknownAddress.AppendLog(
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Fmt("Unrecognized type byte %v", tx.Type))
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}
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// Good!
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coins := tx.Input.Coins.Minus(types.Coins{{"", tx.Fee}})
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inAcc.Sequence += 1
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inAcc.Balance = inAcc.Balance.Minus(tx.Input.Coins)
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// If this is a CheckTx, stop now.
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if isCheckTx {
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state.SetAccount(tx.Input.Address, inAcc)
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return tmsp.OK
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}
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// Create inAcc checkpoint
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inAccDeducted := inAcc.Copy()
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// Run the tx.
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// XXX cache := types.NewStateCache(state)
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cache := state.CacheWrap()
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cache.SetAccount(tx.Input.Address, inAcc)
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ctx := types.NewCallContext(tx.Input.Address, coins)
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res = plugin.RunTx(cache, ctx, tx.Data)
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if res.IsOK() {
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cache.CacheSync()
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log.Info("Successful execution")
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// Fire events
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/*
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if evc != nil {
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exception := ""
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if res.IsErr() {
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exception = res.Error()
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}
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evc.FireEvent(types.EventStringAccInput(tx.Input.Address), types.EventDataTx{tx, ret, exception})
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evc.FireEvent(types.EventStringAccOutput(tx.Address), types.EventDataTx{tx, ret, exception})
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}
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*/
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} else {
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log.Info("AppTx failed", "error", res)
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// Just return the coins and return.
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inAccDeducted.Balance = inAccDeducted.Balance.Plus(coins)
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// But take the gas
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// TODO
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state.SetAccount(tx.Input.Address, inAccDeducted)
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}
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return res
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default:
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return tmsp.ErrBaseEncodingError.SetLog("Unknown tx type")
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}
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}
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//--------------------------------------------------------------------------------
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// The accounts from the TxInputs must either already have
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// crypto.PubKey.(type) != nil, (it must be known),
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// or it must be specified in the TxInput.
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func getInputs(state types.AccountGetter, ins []types.TxInput) (map[string]*types.Account, tmsp.Result) {
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accounts := map[string]*types.Account{}
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for _, in := range ins {
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// Account shouldn't be duplicated
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if _, ok := accounts[string(in.Address)]; ok {
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return nil, tmsp.ErrBaseDuplicateAddress
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}
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acc := state.GetAccount(in.Address)
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if acc == nil {
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return nil, tmsp.ErrBaseUnknownAddress
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}
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if in.PubKey != nil {
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acc.PubKey = in.PubKey
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}
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accounts[string(in.Address)] = acc
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}
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return accounts, tmsp.OK
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}
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func getOrMakeOutputs(state types.AccountGetter, accounts map[string]*types.Account, outs []types.TxOutput) (map[string]*types.Account, tmsp.Result) {
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if accounts == nil {
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accounts = make(map[string]*types.Account)
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}
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for _, out := range outs {
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// Account shouldn't be duplicated
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if _, ok := accounts[string(out.Address)]; ok {
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return nil, tmsp.ErrBaseDuplicateAddress
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}
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acc := state.GetAccount(out.Address)
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// output account may be nil (new)
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if acc == nil {
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acc = &types.Account{
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PubKey: nil,
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Sequence: 0,
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}
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}
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accounts[string(out.Address)] = acc
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}
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return accounts, tmsp.OK
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}
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// Validate inputs basic structure
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func validateInputsBasic(ins []types.TxInput) (res tmsp.Result) {
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for _, in := range ins {
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// Check TxInput basic
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if res := in.ValidateBasic(); res.IsErr() {
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return res
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}
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}
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return tmsp.OK
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}
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// Validate inputs and compute total amount of coins
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func validateInputsAdvanced(accounts map[string]*types.Account, signBytes []byte, ins []types.TxInput) (total types.Coins, res tmsp.Result) {
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for _, in := range ins {
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acc := accounts[string(in.Address)]
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if acc == nil {
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PanicSanity("validateInputsAdvanced() expects account in accounts")
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}
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res = validateInputAdvanced(acc, signBytes, in)
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if res.IsErr() {
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return
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}
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// Good. Add amount to total
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total = total.Plus(in.Coins)
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}
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return total, tmsp.OK
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}
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func validateInputAdvanced(acc *types.Account, signBytes []byte, in types.TxInput) (res tmsp.Result) {
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// Check sequence/coins
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seq, balance := acc.Sequence, acc.Balance
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if seq+1 != in.Sequence {
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return tmsp.ErrBaseInvalidSequence.AppendLog(Fmt("Got %v, expected %v. (acc.seq=%v)", in.Sequence, seq+1, acc.Sequence))
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}
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// Check amount
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if !balance.IsGTE(in.Coins) {
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return tmsp.ErrBaseInsufficientFunds
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}
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// Check signatures
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if !acc.PubKey.VerifyBytes(signBytes, in.Signature) {
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return tmsp.ErrBaseInvalidSignature.AppendLog(Fmt("SignBytes: %X", signBytes))
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}
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return tmsp.OK
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}
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func validateOutputsBasic(outs []types.TxOutput) (res tmsp.Result) {
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for _, out := range outs {
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// Check TxOutput basic
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if res := out.ValidateBasic(); res.IsErr() {
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return res
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}
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}
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return tmsp.OK
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}
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func sumOutputs(outs []types.TxOutput) (total types.Coins) {
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for _, out := range outs {
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total = total.Plus(out.Coins)
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}
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return total
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}
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func adjustByInputs(state types.AccountSetter, accounts map[string]*types.Account, ins []types.TxInput) {
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for _, in := range ins {
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acc := accounts[string(in.Address)]
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if acc == nil {
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PanicSanity("adjustByInputs() expects account in accounts")
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}
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if !acc.Balance.IsGTE(in.Coins) {
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PanicSanity("adjustByInputs() expects sufficient funds")
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}
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acc.Balance = acc.Balance.Minus(in.Coins)
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acc.Sequence += 1
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state.SetAccount(in.Address, acc)
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}
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}
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func adjustByOutputs(state types.AccountSetter, accounts map[string]*types.Account, outs []types.TxOutput, isCheckTx bool) {
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for _, out := range outs {
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acc := accounts[string(out.Address)]
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if acc == nil {
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PanicSanity("adjustByOutputs() expects account in accounts")
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}
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acc.Balance = acc.Balance.Plus(out.Coins)
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if !isCheckTx {
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state.SetAccount(out.Address, acc)
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}
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}
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}
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