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144 lines
4.4 KiB
144 lines
4.4 KiB
package mempool
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import (
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"context"
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"fmt"
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"math"
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abci "github.com/tendermint/tendermint/abci/types"
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"github.com/tendermint/tendermint/internal/p2p"
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"github.com/tendermint/tendermint/types"
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)
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const (
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MempoolChannel = p2p.ChannelID(0x30)
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// PeerCatchupSleepIntervalMS defines how much time to sleep if a peer is behind
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PeerCatchupSleepIntervalMS = 100
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// UnknownPeerID is the peer ID to use when running CheckTx when there is
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// no peer (e.g. RPC)
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UnknownPeerID uint16 = 0
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MaxActiveIDs = math.MaxUint16
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)
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// Mempool defines the mempool interface.
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//
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// Updates to the mempool need to be synchronized with committing a block so
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// applications can reset their transient state on Commit.
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type Mempool interface {
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// CheckTx executes a new transaction against the application to determine
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// its validity and whether it should be added to the mempool.
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CheckTx(ctx context.Context, tx types.Tx, callback func(*abci.Response), txInfo TxInfo) error
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// RemoveTxByKey removes a transaction, identified by its key,
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// from the mempool.
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RemoveTxByKey(txKey types.TxKey) error
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// ReapMaxBytesMaxGas reaps transactions from the mempool up to maxBytes
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// bytes total with the condition that the total gasWanted must be less than
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// maxGas.
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//
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// If both maxes are negative, there is no cap on the size of all returned
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// transactions (~ all available transactions).
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ReapMaxBytesMaxGas(maxBytes, maxGas int64) types.Txs
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// ReapMaxTxs reaps up to max transactions from the mempool. If max is
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// negative, there is no cap on the size of all returned transactions
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// (~ all available transactions).
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ReapMaxTxs(max int) types.Txs
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// Lock locks the mempool. The consensus must be able to hold lock to safely
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// update.
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Lock()
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// Unlock unlocks the mempool.
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Unlock()
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// Update informs the mempool that the given txs were committed and can be
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// discarded.
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//
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// NOTE:
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// 1. This should be called *after* block is committed by consensus.
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// 2. Lock/Unlock must be managed by the caller.
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Update(
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ctx context.Context,
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blockHeight int64,
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blockTxs types.Txs,
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deliverTxResponses []*abci.ResponseDeliverTx,
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newPreFn PreCheckFunc,
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newPostFn PostCheckFunc,
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) error
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// FlushAppConn flushes the mempool connection to ensure async callback calls
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// are done, e.g. from CheckTx.
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//
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// NOTE:
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// 1. Lock/Unlock must be managed by caller.
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FlushAppConn(context.Context) error
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// Flush removes all transactions from the mempool and caches.
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Flush()
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// TxsAvailable returns a channel which fires once for every height, and only
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// when transactions are available in the mempool.
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//
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// NOTE:
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// 1. The returned channel may be nil if EnableTxsAvailable was not called.
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TxsAvailable() <-chan struct{}
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// EnableTxsAvailable initializes the TxsAvailable channel, ensuring it will
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// trigger once every height when transactions are available.
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EnableTxsAvailable()
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// Size returns the number of transactions in the mempool.
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Size() int
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// SizeBytes returns the total size of all txs in the mempool.
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SizeBytes() int64
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}
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// PreCheckFunc is an optional filter executed before CheckTx and rejects
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// transaction if false is returned. An example would be to ensure that a
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// transaction doesn't exceeded the block size.
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type PreCheckFunc func(types.Tx) error
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// PostCheckFunc is an optional filter executed after CheckTx and rejects
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// transaction if false is returned. An example would be to ensure a
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// transaction doesn't require more gas than available for the block.
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type PostCheckFunc func(types.Tx, *abci.ResponseCheckTx) error
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// PreCheckMaxBytes checks that the size of the transaction is smaller or equal
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// to the expected maxBytes.
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func PreCheckMaxBytes(maxBytes int64) PreCheckFunc {
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return func(tx types.Tx) error {
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txSize := types.ComputeProtoSizeForTxs([]types.Tx{tx})
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if txSize > maxBytes {
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return fmt.Errorf("tx size is too big: %d, max: %d", txSize, maxBytes)
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}
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return nil
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}
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}
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// PostCheckMaxGas checks that the wanted gas is smaller or equal to the passed
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// maxGas. Returns nil if maxGas is -1.
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func PostCheckMaxGas(maxGas int64) PostCheckFunc {
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return func(tx types.Tx, res *abci.ResponseCheckTx) error {
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if maxGas == -1 {
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return nil
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}
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if res.GasWanted < 0 {
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return fmt.Errorf("gas wanted %d is negative",
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res.GasWanted)
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}
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if res.GasWanted > maxGas {
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return fmt.Errorf("gas wanted %d is greater than max gas %d",
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res.GasWanted, maxGas)
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}
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return nil
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}
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}
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