// Run a contract's code on an isolated and unpersisted state
// Cannot be used to create new contracts
func Call(fromAddress, toAddress, data []byte) (*ctypes.ResultCall, error) {
st := consensusState.GetState() // performs a copy
cache := state.NewBlockCache(st)
outAcc := cache.GetAccount(toAddress)
if outAcc == nil {
return nil, fmt.Errorf("Account %x does not exist", toAddress)
}
callee := toVMAccount(outAcc)
caller := &vm.Account{Address: LeftPadWord256(fromAddress)}
txCache := state.NewTxCache(cache)
params := vm.Params{
BlockHeight: int64(st.LastBlockHeight),
BlockHash: LeftPadWord256(st.LastBlockHash),
BlockTime: st.LastBlockTime.Unix(),
GasLimit: st.GetGasLimit(),
}
vmach := vm.NewVM(txCache, params, caller.Address, nil)
gas := st.GetGasLimit()
ret, err := vmach.Call(caller, callee, callee.Code, data, 0, &gas)
if err != nil {
return nil, err
}
return &ctypes.ResultCall{Return: ret}, nil
}
func resetPeer(t *testing.T, reactor *MempoolReactor, mempool *Mempool, state *sm.State, tickerChan chan time.Time, newBlockChan chan ResetInfo, peer *TestPeer) *TestPeer {
// reset peer
mempool.txs = []types.Tx{}
mempool.state = state
mempool.cache = sm.NewBlockCache(state)
peer.SetRunning(false)
tickerChan <- time.Now()
peer = newPeer(t, state)
go reactor.broadcastTxRoutine(tickerChan, newBlockChan, peer)
return peer
}
// "block" is the new block being committed.
// "state" is the result of state.AppendBlock("block").
// Txs that are present in "block" are discarded from mempool.
// Txs that have become invalid in the new "state" are also discarded.
func (mem *Mempool) ResetForBlockAndState(block *types.Block, state *sm.State) ResetInfo {
mem.mtx.Lock()
defer mem.mtx.Unlock()
mem.state = state.Copy()
mem.cache = sm.NewBlockCache(mem.state)
// First, create a lookup map of txns in new block.
blockTxsMap := make(map[string]struct{})
for _, tx := range block.Data.Txs {
blockTxsMap[string(types.TxID(state.ChainID, tx))] = struct{}{}
}
// Now we filter all txs from mem.txs that are in blockTxsMap,
// and ExecTx on what remains. Only valid txs are kept.
// We track the ranges of txs included in the block and invalidated by it
// so we can tell peer routines
var ri = ResetInfo{Height: block.Height}
var validTxs []types.Tx
includedStart, invalidStart := -1, -1
for i, tx := range mem.txs {
txID := types.TxID(state.ChainID, tx)
if _, ok := blockTxsMap[string(txID)]; ok {
startRange(&includedStart, i) // start counting included txs
endRange(&invalidStart, i, &ri.Invalid) // stop counting invalid txs
log.Info("Filter out, already committed", "tx", tx, "txID", txID)
} else {
endRange(&includedStart, i, &ri.Included) // stop counting included txs
err := sm.ExecTx(mem.cache, tx, false, nil)
if err != nil {
startRange(&invalidStart, i) // start counting invalid txs
log.Info("Filter out, no longer valid", "tx", tx, "error", err)
} else {
endRange(&invalidStart, i, &ri.Invalid) // stop counting invalid txs
log.Info("Filter in, new, valid", "tx", tx, "txID", txID)
validTxs = append(validTxs, tx)
}
}
}
endRange(&includedStart, len(mem.txs)-1, &ri.Included) // stop counting included txs
endRange(&invalidStart, len(mem.txs)-1, &ri.Invalid) // stop counting invalid txs
// We're done!
log.Info("New txs", "txs", validTxs, "oldTxs", mem.txs)
mem.txs = validTxs
return ri
}
// "block" is the new block being committed.
// "state" is the result of state.AppendBlock("block").
// Txs that are present in "block" are discarded from mempool.
// Txs that have become invalid in the new "state" are also discarded.
func (mem *Mempool) ResetForBlockAndState(block *types.Block, state *sm.State) {
mem.mtx.Lock()
defer mem.mtx.Unlock()
mem.state = state.Copy()
mem.cache = sm.NewBlockCache(mem.state)
// First, create a lookup map of txns in new block.
blockTxsMap := make(map[string]struct{})
for _, tx := range block.Data.Txs {
blockTxsMap[string(types.TxID(state.ChainID, tx))] = struct{}{}
}
// Next, filter all txs from mem.txs that are in blockTxsMap
txs := []types.Tx{}
for _, tx := range mem.txs {
txID := types.TxID(state.ChainID, tx)
if _, ok := blockTxsMap[string(txID)]; ok {
log.Info("Filter out, already committed", "tx", tx, "txID", txID)
continue
} else {
log.Info("Filter in, still new", "tx", tx, "txID", txID)
txs = append(txs, tx)
}
}
// Next, filter all txs that aren't valid given new state.
validTxs := []types.Tx{}
for _, tx := range txs {
err := sm.ExecTx(mem.cache, tx, false, nil)
if err == nil {
log.Info("Filter in, valid", "tx", tx)
validTxs = append(validTxs, tx)
} else {
// tx is no longer valid.
log.Info("Filter out, no longer valid", "tx", tx, "error", err)
}
}
// We're done!
log.Info("New txs", "txs", validTxs, "oldTxs", mem.txs)
mem.txs = validTxs
}
func NewMempool(state *sm.State) *Mempool {
return &Mempool{
state: state,
cache: sm.NewBlockCache(state),
}
}