Create SimpleCall Example

examples/simpleCall/.env.template

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+# use this variable to change the RPC base URL
+#INTEGRATION_BASE=http_insert_end_point

examples/simpleCall/go.mod

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+module account
+
+go 1.18
+
+require github.com/NethermindEth/starknet.go v0.2.1-0.20220620163912-1db2ca279608
+replace github.com/NethermindEth/starknet.go => ../../
+require (
+	github.com/google/go-querystring v1.1.0 // indirect
+	golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e // indirect
+	golang.org/x/sys v0.0.0-20220615213510-4f61da869c0c // indirect
+)

examples/simpleCall/go.work

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+go 1.18
+
+use (
+	.
+	../..
+)

examples/simpleCall/main.go

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+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"github.com/NethermindEth/starknet.go/rpcv02"
+	"github.com/NethermindEth/starknet.go/types"
+	"github.com/NethermindEth/starknet.go/utils"
+	ethrpc "github.com/ethereum/go-ethereum/rpc"
+	"github.com/joho/godotenv"
+)
+
+var (
+	name                string = "mainnet"
+	someMainnetContract string = "0x024dE48Fb640DB135B3dc85ef0FE2789e032FbCA2fca54E58aB8dB93ca22F767"
+	contractMethod      string = "getName"
+)
+
+func main() {
+	fmt.Println("Starting simpeCall example")
+	godotenv.Load(fmt.Sprintf(".env.%s", name))
+	base := os.Getenv("INTEGRATION_BASE")
+	c, err := ethrpc.DialContext(context.Background(), base)
+	if err != nil {
+		panic(err)
+	}
+	clientv02 := rpcv02.NewProvider(c)
+	fmt.Println("Established connection with the client")
+
+	contractAddress, err := utils.HexToFelt(someMainnetContract)
+	if err != nil {
+		panic(err)
+	}
+
+	// Make read contract call
+	tx := rpcv02.FunctionCall{
+		ContractAddress:    contractAddress,
+		EntryPointSelector: types.GetSelectorFromNameFelt(contractMethod),
+	}
+
+	fmt.Println("Making Call() request")
+	callResp, err := clientv02.Call(context.Background(), tx, rpcv02.BlockID{Tag: "latest"})
+	if err != nil {
+		panic(err.Error())
+	}
+
+	fmt.Println(fmt.Sprintf("Response to %s():%s ", contractMethod, callResp[0]))
+}