add totalENV

plugin/dapp/wasm/contracts/common.h

@@ -35,6 +35,7 @@ void printlog(const char* log, size_t len);
 void printint(int64_t n);
 size_t getENVSize(int64_t n);
 size_t getENV(int64_t n, char* value, size_t v_len);
+size_t totalENV();
 
 #ifdef __cplusplus
 }

plugin/dapp/wasm/executor/callback.go

@@ -178,3 +178,7 @@ func getENVSize(n int) int {
 func getENV(n int) string {
 	return wasmCB.ENV[n]
 }
+
+func totalENV() int {
+	return len(wasmCB.ENV)
+}

plugin/dapp/wasm/executor/resolver.go

@@ -302,6 +302,10 @@ func (r *Resolver) ResolveFunc(module, field string) exec.FunctionImport {
 				copy(vm.Memory[valuePtr:valuePtr+valueLen], value)
 				return int64(len(value))
 			}
+		case "totalENV":
+			return func(vm *exec.VirtualMachine) int64 {
+				return int64(totalENV())
+			}
 
 		default:
 			log.Error("ResolveFunc", "unknown field", field)