diff --git a/main_wasm.go b/main_wasm.go
index 812d40e..ad92920 100644
--- a/main_wasm.go
+++ b/main_wasm.go
@@ -3,17 +3,57 @@
 
 package main
 
-import "github.com/marianogappa/truco/truco"
+import (
+	"encoding/json"
+	"syscall/js"
 
-func NewTruco() *truco.GameState {
-	return truco.New()
+	"github.com/marianogappa/truco/truco"
+)
+
+func main() {
+	js.Global().Set("trucoNew", js.FuncOf(trucoNew))
+	js.Global().Set("trucoRunAction", js.FuncOf(trucoRunAction))
+	select {}
 }
 
-func multiply(x, y int) int {
-	return x * y
+var state *truco.GameState
+
+func trucoNew(this js.Value, p []js.Value) interface{} {
+	state = truco.New()
+
+	nbs, err := json.Marshal(state.ToClientGameState(0))
+	if err != nil {
+		panic(err)
+	}
+
+	buffer := js.Global().Get("Uint8Array").New(len(nbs))
+	js.CopyBytesToJS(buffer, nbs)
+	return buffer
 }
 
-func main() {
+func trucoRunAction(this js.Value, p []js.Value) interface{} {
+	jsonBytes := make([]byte, p[0].Length())
+	js.CopyBytesToGo(jsonBytes, p[0])
 
-	select {}
+	newBytes := _runAction(jsonBytes)
+
+	buffer := js.Global().Get("Uint8Array").New(len(newBytes))
+	js.CopyBytesToJS(buffer, newBytes)
+	return buffer
+}
+
+func _runAction(bs []byte) []byte {
+	action, err := truco.DeserializeAction(bs)
+	if err != nil {
+		panic(err)
+	}
+	err = state.RunAction(action)
+	if err != nil {
+		panic(err)
+	}
+	nbs, err := json.Marshal(state.ToClientGameState(0))
+	if err != nil {
+		panic(err)
+	}
+	return nbs
 }