examples: fix linter issues

Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>

examples/engine/engine.go

@@ -4,25 +4,25 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
 )
 
-// NotifyScriptContainer sends runtime notification with script container hash
+// NotifyScriptContainer sends runtime notification with script container hash.
 func NotifyScriptContainer() {
 	tx := runtime.GetScriptContainer()
 	runtime.Notify("Tx", tx.Hash)
 }
 
-// NotifyCallingScriptHash sends runtime notification with calling script hash
+// NotifyCallingScriptHash sends runtime notification with calling script hash.
 func NotifyCallingScriptHash() {
 	callingScriptHash := runtime.GetCallingScriptHash()
 	runtime.Notify("Calling", callingScriptHash)
 }
 
-// NotifyExecutingScriptHash sends runtime notification about executing script hash
+// NotifyExecutingScriptHash sends runtime notification about executing script hash.
 func NotifyExecutingScriptHash() {
 	execScriptHash := runtime.GetExecutingScriptHash()
 	runtime.Notify("Executing", execScriptHash)
 }
 
-// NotifyEntryScriptHash sends notification about entry script hash
+// NotifyEntryScriptHash sends notification about entry script hash.
 func NotifyEntryScriptHash() {
 	entryScriptHash := runtime.GetEntryScriptHash()
 	runtime.Notify("Entry", entryScriptHash)

examples/iterator/iterator.go

@@ -7,7 +7,7 @@ import (
 )
 
 // _deploy primes contract's storage with some data to be used later.
-func _deploy(_ any, _ bool) {
+func _deploy(_ any, _ bool) { // nolint: unused
 	ctx := storage.GetContext() // RW context.
 	storage.Put(ctx, "foo1", "1")
 	storage.Put(ctx, "foo2", "2")

examples/nft-nd-nns/nns.go

@@ -60,7 +60,7 @@ const (
 // Other constants.
 const (
 	// defaultRegisterPrice is the default price for new domain registration.
-	defaultRegisterPrice = 10_0000_0000
+	defaultRegisterPrice = 10_0000_0000 // nolint: unused
 	// millisecondsInYear is amount of milliseconds per year.
 	millisecondsInYear = 365 * 24 * 3600 * 1000
 )
@@ -79,7 +79,7 @@ func Update(nef []byte, manifest string) {
 }
 
 // _deploy initializes defaults (total supply and registration price) on contract deploy.
-func _deploy(data any, isUpdate bool) {
+func _deploy(data any, isUpdate bool) { // nolint: unused
 	if isUpdate {
 		return
 	}
@@ -491,7 +491,7 @@ func getRecordKey(tokenId []byte, name string, typ RecordType) []byte {
 
 // isValid returns true if the provided address is a valid Uint160.
 func isValid(address interop.Hash160) bool {
-	return address != nil && len(address) == 20
+	return address != nil && len(address) == 20 // nolint: gosimple
 }
 
 // checkCommittee panics if the script container is not signed by the committee.
@@ -555,7 +555,7 @@ func splitAndCheck(name string, allowMultipleFragments bool) []string {
 	if l > 2 && !allowMultipleFragments {
 		return nil
 	}
-	for i := 0; i < l; i++ {
+	for i := range fragments {
 		if !checkFragment(fragments[i], i == l-1) {
 			return nil
 		}

examples/nft-nd-nns/nns_test.go

@@ -418,11 +418,9 @@ func testTokensOf(t *testing.T, c *neotest.ContractInvoker, result [][]byte, arg
 	}
 	require.NoError(t, err)
 	iter := s.Pop().Interop().Value().(*storage.Iterator)
-	arr := make([]stackitem.Item, 0, len(result))
 	for i := range result {
 		require.True(t, iter.Next())
 		require.Equal(t, result[i], iter.Value().Value())
-		arr = append(arr, stackitem.Make(result[i]))
 	}
 	require.False(t, iter.Next())
 }

examples/nft-nd/nft.go

@@ -26,7 +26,7 @@ const (
 	totalSupplyPrefix = "s"
 	// balancePrefix contains map from addresses to balances.
 	balancePrefix = "b"
-	// accountPrefix contains map from address + token id to tokens
+	// accountPrefix contains map from address + token id to tokens.
 	accountPrefix = "a"
 	// tokenPrefix contains map from token id to it's owner.
 	tokenPrefix = "t"

examples/runtime/runtime.go

@@ -7,7 +7,7 @@ import (
 )
 
 var (
-	// Check if the invoker of the contract is the specified owner
+	// Check if the invoker of the contract is the specified owner.
 	owner = address.ToHash160("NbrUYaZgyhSkNoRo9ugRyEMdUZxrhkNaWB")
 )
 
@@ -22,7 +22,7 @@ func init() {
 
 // _deploy is called after contract deployment or update, it'll be called
 // in deployment transaction and if call update method of this contract.
-func _deploy(_ any, isUpdate bool) {
+func _deploy(_ any, isUpdate bool) { // nolint: unused
 	if isUpdate {
 		Log("_deploy method called after contract update")
 		return

examples/storage/storage.go

@@ -5,13 +5,13 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/interop/storage"
 )
 
-// ctx holds storage context for contract methods
+// ctx holds storage context for contract methods.
 var ctx storage.Context
 
 // defaultKey represents the default key.
 var defaultKey = []byte("default")
 
-// init inits storage context before any other contract method is called
+// init inits storage context before any other contract method is called.
 func init() {
 	ctx = storage.GetContext()
 }

examples/timer/timer.go

@@ -9,15 +9,15 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/interop/storage"
 )
 
-const defaultTicks = 3
+const defaultTicks = 3 // nolint: unused
 const mgmtKey = "mgmt"
 
 var (
-	// ctx holds storage context for contract methods
+	// ctx holds storage context for contract methods.
 	ctx storage.Context
-	// Check if the invoker of the contract is the specified owner
+	// Check if the invoker of the contract is the specified owner.
 	owner = address.ToHash160("NbrUYaZgyhSkNoRo9ugRyEMdUZxrhkNaWB")
-	// ticksKey is a storage key for ticks counter
+	// ticksKey is a storage key for ticks counter.
 	ticksKey = []byte("ticks")
 )
 
@@ -25,7 +25,7 @@ func init() {
 	ctx = storage.GetContext()
 }
 
-func _deploy(_ any, isUpdate bool) {
+func _deploy(_ any, isUpdate bool) { // nolint: unused
 	if isUpdate {
 		ticksLeft := storage.Get(ctx, ticksKey).(int) + 1
 		storage.Put(ctx, ticksKey, ticksLeft)

examples/token/nep17/nep17.go

@@ -8,7 +8,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/interop/storage"
 )
 
-// Token holds all token info
+// Token holds all token info.
 type Token struct {
 	// Token name
 	Name string
@@ -35,17 +35,17 @@ func getIntFromDB(ctx storage.Context, key []byte) int {
 	return res
 }
 
-// GetSupply gets the token totalSupply value from VM storage
+// GetSupply gets the token totalSupply value from VM storage.
 func (t Token) GetSupply(ctx storage.Context) int {
 	return getIntFromDB(ctx, []byte(t.CirculationKey))
 }
 
-// BalanceOf gets the token balance of a specific address
+// BalanceOf gets the token balance of a specific address.
 func (t Token) BalanceOf(ctx storage.Context, holder []byte) int {
 	return getIntFromDB(ctx, holder)
 }
 
-// Transfer token from one user to another
+// Transfer token from one user to another.
 func (t Token) Transfer(ctx storage.Context, from, to interop.Hash160, amount int, data any) bool {
 	amountFrom := t.CanTransfer(ctx, from, to, amount)
 	if amountFrom == -1 {
@@ -74,7 +74,7 @@ func (t Token) Transfer(ctx storage.Context, from, to interop.Hash160, amount in
 	return true
 }
 
-// CanTransfer returns the amount it can transfer
+// CanTransfer returns the amount it can transfer.
 func (t Token) CanTransfer(ctx storage.Context, from []byte, to []byte, amount int) int {
 	if len(to) != 20 || !IsUsableAddress(from) {
 		return -1
@@ -94,10 +94,9 @@ func (t Token) CanTransfer(ctx storage.Context, from []byte, to []byte, amount i
 	return amountFrom
 }
 
-// IsUsableAddress checks if the sender is either the correct Neo address or SC address
+// IsUsableAddress checks if the sender is either the correct Neo address or SC address.
 func IsUsableAddress(addr []byte) bool {
 	if len(addr) == 20 {
-
 		if runtime.CheckWitness(addr) {
 			return true
 		}
@@ -112,13 +111,13 @@ func IsUsableAddress(addr []byte) bool {
 	return false
 }
 
-// Mint initial supply of tokens
+// Mint initial supply of tokens.
 func (t Token) Mint(ctx storage.Context, to interop.Hash160) bool {
 	if !IsUsableAddress(t.Owner) {
 		return false
 	}
 	minted := storage.Get(ctx, []byte("minted"))
-	if minted != nil && minted.(bool) == true {
+	if minted != nil && minted.(bool) {
 		return false
 	}
 

examples/token/token.go

@@ -19,7 +19,7 @@ var (
 )
 
 // init initializes Token Interface and storage context for the Smart
-// Contract to operate with
+// Contract to operate with.
 func init() {
 	token = nep17.Token{
 		Name:           "Awesome NEO Token",
@@ -32,32 +32,32 @@ func init() {
 	ctx = storage.GetContext()
 }
 
-// Symbol returns the token symbol
+// Symbol returns the token symbol.
 func Symbol() string {
 	return token.Symbol
 }
 
-// Decimals returns the token decimals
+// Decimals returns the token decimals.
 func Decimals() int {
 	return token.Decimals
 }
 
-// TotalSupply returns the token total supply value
+// TotalSupply returns the token total supply value.
 func TotalSupply() int {
 	return token.GetSupply(ctx)
 }
 
-// BalanceOf returns the amount of token on the specified address
+// BalanceOf returns the amount of token on the specified address.
 func BalanceOf(holder interop.Hash160) int {
 	return token.BalanceOf(ctx, holder)
 }
 
-// Transfer token from one user to another
+// Transfer token from one user to another.
 func Transfer(from interop.Hash160, to interop.Hash160, amount int, data any) bool {
 	return token.Transfer(ctx, from, to, amount, data)
 }
 
-// Mint initial supply of tokens
+// Mint initial supply of tokens.
 func Mint(to interop.Hash160) bool {
 	return token.Mint(ctx, to)
 }

examples/zkp/cubic_circuit/main.go

@@ -51,7 +51,7 @@ func (circuit *CubicCircuit) Define(api frontend.API) error {
 
 // main demonstrates how to build the proof and verify it with the help of gnark
 // library. Error handling omitted intentionally to simplify the example.
-func main() {
+func main() { // nolint: unused
 	var (
 		circuit    CubicCircuit
 		assignment = CubicCircuit{X: 3, Y: 35}

examples/zkp/cubic_circuit/main_test.go

@@ -315,7 +315,7 @@ func setup(t *testing.T, ccs constraint.ConstraintSystem, phase1ResponsePath str
 	// receive a []byte, deserialize it, add his contribution and send back to
 	// coordinator, like it is done in https://github.com/bnb-chain/zkbnb-setup
 	// for BN254 elliptic curve.
-	for i := range nContributionsPhase2 {
+	for range nContributionsPhase2 {
 		srs2.Contribute()
 	}
 

examples/zkp/xor_compat/verify.go

@@ -43,7 +43,7 @@ var (
 // proving system and is taken from the
 // https://github.com/neo-project/neo/issues/2647#issuecomment-1002893109 without
 // changes. The verification process checks the following equality:
-// A * B = alpha * beta + sum(pub_input[i] * (beta * u_i(x) + alpha * v_i(x) + w_i(x)) / gamma) * gamma + C * delta
+// A * B = alpha * beta + sum(pub_input[i] * (beta * u_i(x) + alpha * v_i(x) + w_i(x)) / gamma) * gamma + C * delta.
 func VerifyProof(a []byte, b []byte, c []byte, publicInput [][]byte) bool {
 	alphaPoint := crypto.Bls12381Deserialize(alpha)
 	betaPoint := crypto.Bls12381Deserialize(beta)
@@ -68,11 +68,11 @@ func VerifyProof(a []byte, b []byte, c []byte, publicInput [][]byte) bool {
 		panic("error: inputlen or iclen")
 	}
 	icPoints := make([]crypto.Bls12381Point, iclen)
-	for i := 0; i < iclen; i++ {
+	for i := range icPoints {
 		icPoints[i] = crypto.Bls12381Deserialize(ic[i])
 	}
 	acc := icPoints[0]
-	for i := 0; i < inputlen; i++ {
+	for i := range publicInput {
 		scalar := publicInput[i] // 32-bytes LE field element.
 		temp := crypto.Bls12381Mul(icPoints[i+1], scalar, false)
 		acc = crypto.Bls12381Add(acc, temp)