core, core/vm: implemented a generic environment (#3348)

Environment is now a struct (not an interface). This
reduces a lot of tech-debt throughout the codebase where a virtual
machine environment had to be implemented in order to test or run it.

The new environment is suitable to be used en the json tests, core
consensus and light client.

1 files changed, 2 insertions, 2 deletions

diff --git a/core/vm/segments.go b/core/vm/segments.go
index 648d8a04a..47f535ab5 100644
--- a/core/vm/segments.go
+++ b/core/vm/segments.go
@@ -24,7 +24,7 @@ type jumpSeg struct {
 	gas *big.Int
 }
 
-func (j jumpSeg) do(program *Program, pc *uint64, env Environment, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
+func (j jumpSeg) do(program *Program, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
 	if !contract.UseGas(j.gas) {
 		return nil, OutOfGasError
 	}
@@ -42,7 +42,7 @@ type pushSeg struct {
 	gas  *big.Int
 }
 
-func (s pushSeg) do(program *Program, pc *uint64, env Environment, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
+func (s pushSeg) do(program *Program, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
 	// Use the calculated gas. When insufficient gas is present, use all gas and return an
 	// Out Of Gas error
 	if !contract.UseGas(s.gas) {