interface.go

package vm

import (
	"math/big"

	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/core/vm"
)

// CallContext provides a basic interface for the EVM calling conventions. The EVM
// depends on this context being implemented for doing subcalls and initialising new EVM contracts.
type CallContext interface {
	// Call another contract
	Call(env *vm.EVM, me vm.ContractRef, addr common.Address, data []byte, gas, value *big.Int) ([]byte, error)
	// Take another's contract code and execute within our own context
	CallCode(env *vm.EVM, me vm.ContractRef, addr common.Address, data []byte, gas, value *big.Int) ([]byte, error)
	// Same as CallCode except sender and value is propagated from parent to child scope
	DelegateCall(env *vm.EVM, me vm.ContractRef, addr common.Address, data []byte, gas *big.Int) ([]byte, error)
	// Create a new contract
	Create(env *vm.EVM, me vm.ContractRef, data []byte, gas, value *big.Int) ([]byte, common.Address, error)
}