keep interface

CHANGELOG.md

@@ -48,6 +48,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * [#252](https://github.com/crypto-org-chain/cosmos-sdk/pull/252) Add `BlockGasWanted` to `Context` to support feemarket module.
 * [#269](https://github.com/crypto-org-chain/cosmos-sdk/pull/269) Add `StreamingManager` to baseapp to extend the abci listeners.
 * (crypto/keyring) [#20212](https://github.com/cosmos/cosmos-sdk/pull/20212) Expose the db keyring used in the keystore.
+* (baseapp) [#565](https://github.com/crypto-org-chain/cosmos-sdk/pull/565) Support incarnation cache when executed in block-stm.
 
 ### Improvements
 

types/context.go

@@ -75,6 +75,10 @@ type Context struct {
 	blockGasUsed uint64
 	// sum the gas wanted by all the transactions in the current block, only accessible by end blocker
 	blockGasWanted uint64
+
+	// incarnationCache is shared between multiple incarnations of the same transaction,
+	// it must only cache stateless computation results that only depends on tx body and block level information that don't change during block execution, like the result of tx signature verification.
+	incarnationCache map[string]any
 }
 
 // Proposed rename, not done to avoid API breakage
@@ -107,6 +111,23 @@ func (c Context) MsgIndex() int                                 { return c.msgIn
 func (c Context) TxCount() int                                  { return c.txCount }
 func (c Context) BlockGasUsed() uint64                          { return c.blockGasUsed }
 func (c Context) BlockGasWanted() uint64                        { return c.blockGasWanted }
+func (c Context) IncarnationCache() map[string]any              { return c.incarnationCache }
+
+func (c Context) GetIncarnationCache(key string) (any, bool) {
+	if c.incarnationCache == nil {
+		return nil, false
+	}
+	val, ok := c.incarnationCache[key]
+	return val, ok
+}
+
+func (c Context) SetIncarnationCache(key string, value any) {
+	if c.incarnationCache == nil {
+		// noop if cache is not initialized
+		return
+	}
+	c.incarnationCache[key] = value
+}
 
 // BlockHeader returns the header by value (shallow copy).
 func (c Context) BlockHeader() cmtproto.Header {
@@ -352,6 +373,11 @@ func (c Context) WithBlockGasWanted(gasWanted uint64) Context {
 	return c
 }
 
+func (c Context) WithIncarnationCache(cache map[string]any) Context {
+	c.incarnationCache = cache
+	return c
+}
+
 // TODO: remove???
 func (c Context) IsZero() bool {
 	return c.ms == nil