core: move System.ExecutionEngine.* interops to System.Runtime.*

pkg/interop/runtime/engine.go

@@ -0,0 +1,38 @@
+package runtime
+
+import "github.com/nspcc-dev/neo-go/pkg/interop/blockchain"
+
+// GetScriptContainer returns the transaction that initially triggered current
+// execution context. It never changes in a single execution, no matter how deep
+// this execution goes. This function uses
+// `System.Runtime.GetScriptContainer` syscall.
+func GetScriptContainer() blockchain.Transaction {
+	return blockchain.Transaction{}
+}
+
+// GetExecutingScriptHash returns script hash (160 bit in BE form represented
+// as 20-byte slice) of the contract that is currently being executed. Any
+// AppCall can change the value returned by this function if it calls a
+// different contract. This function uses
+// `System.Runtime.GetExecutingScriptHash` syscall.
+func GetExecutingScriptHash() []byte {
+	return nil
+}
+
+// GetCallingScriptHash returns script hash (160 bit in BE form represented
+// as 20-byte slice) of the contract that started the execution of the currently
+// running context (caller of current contract or function), so it's one level
+// above the GetExecutingScriptHash in the call stack. It uses
+// `System.Runtime.GetCallingScriptHash` syscall.
+func GetCallingScriptHash() []byte {
+	return nil
+}
+
+// GetEntryScriptHash returns script hash (160 bit in BE form represented
+// as 20-byte slice) of the contract that initially started current execution
+// (this is a script that is contained in a transaction returned by
+// GetScriptContainer) execution from the start. This function uses
+// `System.Runtime.GetEntryScriptHash` syscall.
+func GetEntryScriptHash() []byte {
+	return nil
+}