chore(examples): Fix go folder layout

Makefile

@@ -118,12 +118,12 @@ go-example: ## Run a specific Go example. Usage: make go-example example
 go-example:
 	@printf "\nRunning Go example \"$(word 2,$(MAKECMDGOALS))\"\n"
 	@cd bindings/go/examples; \
-	LD_LIBRARY_PATH="../../../target/release" CGO_LDFLAGS="-liota_sdk_ffi -L../../../target/release" go run $(word 2,$(MAKECMDGOALS)).go || exit $$?; \
+	LD_LIBRARY_PATH="../../../target/release" CGO_LDFLAGS="-liota_sdk_ffi -L../../../target/release" go run $(word 2,$(MAKECMDGOALS))/main.go || exit $$?; \
 	cd -
 
 .PHONY: go-examples
 go-examples: ## Run all Go bindings examples
-	@for example in $$(find bindings/go/examples -name "*.go" -exec basename {} .go \;); do \
+	@for example in $$(find bindings/go/examples/* -type d -exec basename {} \;); do \
 		$(MAKE) go-example "$$example" || exit $$?; \
 	done
 

bindings/go/common/common.go

@@ -0,0 +1,12 @@
+package common
+
+import (
+	sdk "bindings/iota_sdk_ffi"
+)
+
+func IsClientErr(err error) bool {
+	if sdkErr, ok := err.(*sdk.SdkFfiError); ok {
+		return sdkErr == nil
+	}
+	return false
+}

bindings/go/examples/chain_id.go → bindings/go/examples/chain_id/main.go

@@ -7,22 +7,16 @@ import (
 	"fmt"
 	"log"
 
+	"bindings/common"
 	sdk "bindings/iota_sdk_ffi"
 )
 
-func isNilError(err error) bool {
-	if sdkErr, ok := err.(*sdk.SdkFfiError); ok {
-		return sdkErr == nil
-	}
-	return false
-}
-
 func main() {
 	client := sdk.GraphQlClientNewDevnet()
 
 	chainID, err := client.ChainId()
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get chain ID: %v", err)
 	}
 	fmt.Println("Chain ID:", chainID)
-}
+}

bindings/go/examples/epoch.go → bindings/go/examples/epoch/main.go

@@ -7,22 +7,16 @@ import (
 	"fmt"
 	"log"
 
+	"bindings/common"
 	sdk "bindings/iota_sdk_ffi"
 )
 
-func isNilError(err error) bool {
-	if sdkErr, ok := err.(*sdk.SdkFfiError); ok {
-		return sdkErr == nil
-	}
-	return false
-}
-
 func main() {
 	client := sdk.GraphQlClientNewDevnet()
 
 	// Get current epoch
 	currentEpoch, err := client.Epoch(nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get current epoch: %v", err)
 	}
 	if currentEpoch == nil {
@@ -35,7 +29,7 @@ func main() {
 	// Get previous epoch
 	previousEpochId := currentEpoch.EpochId - 1
 	previousEpoch, err := client.Epoch(&previousEpochId)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get previous epoch: %v", err)
 	}
 	if previousEpoch == nil {

bindings/go/examples/example.go → bindings/go/examples/example/main.go

@@ -7,16 +7,10 @@ import (
 	"fmt"
 	"log"
 
+	"bindings/common"
 	sdk "bindings/iota_sdk_ffi"
 )
 
-func isNilError(err error) bool {
-	if sdkErr, ok := err.(*sdk.SdkFfiError); ok {
-		return sdkErr == nil
-	}
-	return false
-}
-
 func main() {
 	client := sdk.GraphQlClientNewDevnet()
 
@@ -26,7 +20,7 @@ func main() {
 	}
 
 	coins, err := client.Coins(address, nil, nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get coins: %v", err)
 	}
 
@@ -35,7 +29,7 @@ func main() {
 	}
 
 	balance, err := client.Balance(address, nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get balance: %v", err)
 	}
 	fmt.Printf("Total Balance = %d\n", *balance)
@@ -47,7 +41,7 @@ func main() {
 	}
 	txFilter := sdk.TransactionsFilter{
 		AtCheckpoint: &atCheckpoint,
-		InputObject: &inputObject,
+		InputObject:  &inputObject,
 	}
 	eventFilter := sdk.EventFilter{
 		Sender: &address,

bindings/go/examples/get_object.go → bindings/go/examples/get_object/main.go

@@ -8,16 +8,10 @@ import (
 	"fmt"
 	"log"
 
+	"bindings/common"
 	sdk "bindings/iota_sdk_ffi"
 )
 
-func isNilError(err error) bool {
-	if sdkErr, ok := err.(*sdk.SdkFfiError); ok {
-		return sdkErr == nil
-	}
-	return false
-}
-
 func main() {
 	client := sdk.GraphQlClientNewDevnet()
 
@@ -27,7 +21,7 @@ func main() {
 	}
 
 	objOpt, err := client.Object(objectID, nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get object contents: %v", err)
 	}
 	if objOpt == nil {
@@ -36,7 +30,7 @@ func main() {
 	obj := *objOpt
 
 	objType := "Package"
-	if obj.ObjectType().IsStruct() { 
+	if obj.ObjectType().IsStruct() {
 		objType = obj.ObjectType().AsStruct().String()
 	}
 
@@ -50,11 +44,11 @@ func main() {
 	}
 
 	fmt.Println("Object ID:", obj.ObjectId().ToHex())
-    fmt.Println("Version:", obj.Version())
-    fmt.Println("Previous transaction:", obj.PreviousTransaction().ToBase58())
-    fmt.Println("Owner:", objOwner)
-    fmt.Println("Storage rebate:", obj.StorageRebate())
-    fmt.Println("Type:", objType)
-    fmt.Println("BCS bytes:", hex.EncodeToString(obj.AsStruct().Contents))
+	fmt.Println("Version:", obj.Version())
+	fmt.Println("Previous transaction:", obj.PreviousTransaction().ToBase58())
+	fmt.Println("Owner:", objOwner)
+	fmt.Println("Storage rebate:", obj.StorageRebate())
+	fmt.Println("Type:", objType)
+	fmt.Println("BCS bytes:", hex.EncodeToString(obj.AsStruct().Contents))
 
 }

bindings/go/examples/move_functions.go → bindings/go/examples/move_functions/main.go

@@ -4,17 +4,12 @@
 package main
 
 import (
-	sdk "bindings/iota_sdk_ffi"
 	"fmt"
 	"log"
-)
 
-func isNilError(err error) bool {
-	if sdkErr, ok := err.(*sdk.SdkFfiError); ok {
-		return sdkErr == nil
-	}
-	return false
-}
+	"bindings/common"
+	sdk "bindings/iota_sdk_ffi"
+)
 
 func main() {
 	client := sdk.GraphQlClientNewDevnet()
@@ -23,17 +18,17 @@ func main() {
 	if err != nil {
 		log.Fatalf("Failed to parse address: %v", err)
 	}
-	
+
 	packageOpt, err := client.Package(packageAddress, nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get package: %v", err)
 	}
 	if packageOpt == nil {
 		log.Fatalf("Missing package: %v", err)
 	}
 	pkg := *packageOpt
 
-	for moduleId, _ := range pkg.Modules() {
+	for moduleId := range pkg.Modules() {
 		moduleOpt, err := client.NormalizedMoveModule(
 			packageAddress,
 			moduleId.AsStr(),
@@ -43,7 +38,7 @@ func main() {
 			nil,
 			nil,
 		)
-		if !isNilError(err) {
+		if !common.IsClientErr(err) {
 			log.Fatalf("Failed to get module: %v", err)
 		}
 		if moduleOpt == nil {

bindings/go/examples/stake.go → bindings/go/examples/stake/main.go

@@ -6,16 +6,10 @@ package main
 import (
 	"log"
 
+	"bindings/common"
 	sdk "bindings/iota_sdk_ffi"
 )
 
-func isNilError(err error) bool {
-	if sdkErr, ok := err.(*sdk.SdkFfiError); ok {
-		return sdkErr == nil
-	}
-	return false
-}
-
 func main() {
 	client := sdk.GraphQlClientNewDevnet()
 
@@ -25,7 +19,7 @@ func main() {
 	}
 
 	validators, err := client.ActiveValidators(nil, &sdk.PaginationFilter{Direction: sdk.DirectionForward})
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get active validators: %v", err)
 	}
 
@@ -47,7 +41,7 @@ func main() {
 		log.Fatalf("Failed to parse object ID: %v", err)
 	}
 	coin, err := client.Object(coinObjId, nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get coin: %v", err)
 	}
 
@@ -56,7 +50,7 @@ func main() {
 		log.Fatalf("Failed to parse object ID: %v", err)
 	}
 	gasCoin, err := client.Object(gasCoinObjId, nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get gas coin: %v", err)
 	}
 
@@ -97,7 +91,7 @@ func main() {
 	builder.SetSender(myAddress)
 	builder.SetGasBudget(50000000)
 	gasPrice, err := client.ReferenceGasPrice(nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get gas price: %v", err)
 	}
 	builder.SetGasPrice(*gasPrice)
@@ -109,7 +103,7 @@ func main() {
 	}
 
 	res, err := client.DryRunTx(txn, nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get gas price: %v", err)
 	}
 

bindings/go/examples/transactions_with_shared.go → bindings/go/examples/transactions_with_shared/main.go

@@ -7,16 +7,10 @@ import (
 	"fmt"
 	"log"
 
+	"bindings/common"
 	sdk "bindings/iota_sdk_ffi"
 )
 
-func isNilError(err error) bool {
-	if sdkErr, ok := err.(*sdk.SdkFfiError); ok {
-		return sdkErr == nil
-	}
-	return false
-}
-
 func main() {
 	client := sdk.GraphQlClientNewDevnet()
 
@@ -26,7 +20,7 @@ func main() {
 	}
 
 	transactions, err := client.Transactions(&sdk.TransactionsFilter{InputObject: &sharedObjId}, nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get transactions: %v", err)
 	}
 

bindings/go/examples/unstake.go → bindings/go/examples/unstake/main.go

@@ -6,22 +6,16 @@ package main
 import (
 	"log"
 
+	"bindings/common"
 	sdk "bindings/iota_sdk_ffi"
 )
 
-func isNilError(err error) bool {
-	if sdkErr, ok := err.(*sdk.SdkFfiError); ok {
-		return sdkErr == nil
-	}
-	return false
-}
-
 func main() {
 	client := sdk.GraphQlClientNewDevnet()
 
 	stakedIotaType := "0x3::staking_pool::StakedIota"
 	stakedIotas, err := client.Objects(&sdk.ObjectFilter{TypeTag: &stakedIotaType}, nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get staked iota: %v", err)
 	}
 	if len(stakedIotas.Data) == 0 {
@@ -31,7 +25,7 @@ func main() {
 
 	gasCoinType := sdk.StructTagGasCoin().String()
 	gasCoins, err := client.Objects(&sdk.ObjectFilter{TypeTag: &gasCoinType, Owner: stakedIota.Owner().AsAddressOpt()}, nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get gas coin: %v", err)
 	}
 	if len(gasCoins.Data) == 0 {
@@ -76,7 +70,7 @@ func main() {
 	builder.SetSender(gasCoin.Owner().AsAddress())
 	builder.SetGasBudget(50000000)
 	gasPrice, err := client.ReferenceGasPrice(nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get gas price: %v", err)
 	}
 	builder.SetGasPrice(*gasPrice)
@@ -88,7 +82,7 @@ func main() {
 	}
 
 	res, err := client.DryRunTx(txn, nil)
-	if !isNilError(err) {
+	if !common.IsClientErr(err) {
 		log.Fatalf("Failed to get gas price: %v", err)
 	}