fix(): add example

Author: zyjblockchain

README.md

@@ -26,14 +26,14 @@ func main() {
 		panic(err)
 	}
 
-	signedTx, err := wallet.SendAR(
+	tx, err := wallet.SendAR(
   //id, err := wallet.SendWinston( 
 		big.NewFloat(1.0), // AR amount
 		{{target}}, // target address
 		[]types.Tag{},
 	)
 
-	fmt.Println(signedTx.ID, err)
+	fmt.Println(tx.ID, err)
 }
 
 ```

example/api_example_test.go

@@ -1,6 +1,8 @@
 package example
 
 import (
+	"github.com/everFinance/goar/types"
+	"io/ioutil"
 	"testing"
 
 	"github.com/everFinance/goar"
@@ -88,7 +90,7 @@ func Test_Arq(t *testing.T) {
 	t.Log(ids)
 }
 
-func Test_SendFormat1Tx(t *testing.T) {
+func Test_SendFormatTx(t *testing.T) {
 	// arNode := "https://arweave.net"
 	// wallet, err := goar.NewWalletFromPath("./testKey.json", arNode)
 	// assert.NoError(t, err)
@@ -131,3 +133,30 @@ func Test_SendFormat1Tx(t *testing.T) {
 	// t.Log("from: ",wallet.Address)
 	// t.Log("txHash: ", tx.ID)
 }
+
+func Test_SendData(t *testing.T) {
+	arNode := "https://arweave.net"
+	w, err := goar.NewWalletFromPath("./wallet/account1.json", arNode) // your wallet private key
+	assert.NoError(t, err)
+
+	data, err := ioutil.ReadFile("/Users/sandyzhou/Downloads/abc.jpeg") // local file path
+	if err != nil {
+		panic(err)
+	}
+	tags := []types.Tag{
+		{Name: "Sender", Value: "Jie"},
+		{Name: "Data-Introduce", Value: "Happy anniversary, my google and dearest! I‘m so grateful to have you in my life. I love you to infinity and beyond! (⁎⁍̴̛ᴗ⁍̴̛⁎)"},
+	}
+	tx, err := w.SendDataSpeedUp(data, tags, 10)
+	assert.NoError(t, err)
+	t.Logf("tx hash: %s", tx.ID)
+}
+
+func Test_LoadData(t *testing.T) {
+	arCli := goar.NewClient("https://arweave.net")
+
+	arId := "r90Z_PuhD-louq6uzLTI-xWMfB5TzIti30o7QvW-6A4"
+	data, err := arCli.GetTransactionData(arId)
+	assert.NoError(t, err)
+	t.Log(len(data))
+}