evmos · GAtom22 · Sep 10, 2024 · Sep 10, 2024
@@ -47,6 +47,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Improvements
 
+- (evm) [#2837](https://github.com/evmos/evmos/pull/2837) Update `Interpreter` interface and public functions to support custom Opcodes.
 - (inflation) [#2813](https://github.com/evmos/evmos/pull/2813) Fix communityPool is nil.
 - (evm) [#2683](https://github.com/evmos/evmos/pull/2683) Remove duplicate definitions of precompile addresses.
 - (evm) [#2709](https://github.com/evmos/evmos/pull/2709) Minor improvements in precompiles related code.
@@ -1087,5 +1088,3 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 - (cli) [#26](https://github.com/evmos/evmos/pull/26) Use config on genesis accounts.
 - (deps) [#28](https://github.com/evmos/evmos/pull/28) Bump Ethermint version to `v0.7.0`.
-
-
@@ -22,6 +22,12 @@ import (
 	"github.com/holiman/uint256"
 )
 
+// CalcMemSize64 calculates the required memory size, and returns
+// the size and whether the result overflowed uint64
+func CalcMemSize64(off, l *uint256.Int) (uint64, bool) {
+	return calcMemSize64(off, l)
+}
+
 // calcMemSize64 calculates the required memory size, and returns
 // the size and whether the result overflowed uint64
 func calcMemSize64(off, l *uint256.Int) (uint64, bool) {

@@ -94,6 +94,16 @@ type CallContext interface {
 // The Interpreter will run the byte code VM based on the passed
 // configuration.
 type Interpreter interface {
+	// EVM returns the EVM instance
+	EVM() *EVM
+	// Config returns the configuration of the interpreter
+	Config() Config
+	// ReadOnly returns whether the interpreter is in read-only mode
+	ReadOnly() bool
+	// ReturnData gets the last CALL's return data for subsequent reuse
+	ReturnData() []byte
+	// SetReturnData sets the last CALL's return data
+	SetReturnData([]byte)
 	// Run loops and evaluates the contract's code with the given input data and returns
 	// the return byte-slice and an error if one occurred.
 	Run(contract *Contract, input []byte, static bool) ([]byte, error)

@@ -94,6 +94,31 @@ func NewEVMInterpreter(evm *EVM, cfg Config) *EVMInterpreter {
 	}
 }
 
+// EVM returns the EVM instance
+func (in *EVMInterpreter) EVM() *EVM {
+	return in.evm
+}
+
+// Config returns the configuration of the interpreter
+func (in EVMInterpreter) Config() Config {
+	return in.cfg
+}
+
+// ReadOnly returns whether the interpreter is in read-only mode
+func (in EVMInterpreter) ReadOnly() bool {
+	return in.readOnly
+}
+
+// ReturnData gets the last CALL's return data for subsequent reuse
+func (in *EVMInterpreter) ReturnData() []byte {
+	return in.returnData
+}
+
+// SetReturnData sets the last CALL's return data
+func (in *EVMInterpreter) SetReturnData(data []byte) {
+	in.returnData = data
+}
+
 // Run loops and evaluates the contract's code with the given input data and returns
 // the return byte-slice and an error if one occurred.
 //

@@ -103,3 +103,9 @@ func (m *Memory) Len() int {
 func (m *Memory) Data() []byte {
 	return m.store
 }
+
+// GasCost calculates the quadratic gas for memory expansion. It does so
+// only for the memory region that is expanded, not the total memory.
+func (m *Memory) GasCost(newMemSize uint64) (uint64, error) {
+	return memoryGasCost(m, newMemSize)
+}