smartconract: generate RPC binding wrappers for events

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

cli/smartcontract/testdata/gas/gas.go

@@ -2,13 +2,25 @@
 package gastoken
 
 import (
+	"errors"
+	"fmt"
+	"github.com/nspcc-dev/neo-go/pkg/neorpc/result"
 	"github.com/nspcc-dev/neo-go/pkg/rpcclient/nep17"
 	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
+	"math/big"
 )
 
 // Hash contains contract hash.
 var Hash = util.Uint160{0xcf, 0x76, 0xe2, 0x8b, 0xd0, 0x6, 0x2c, 0x4a, 0x47, 0x8e, 0xe3, 0x55, 0x61, 0x1, 0x13, 0x19, 0xf3, 0xcf, 0xa4, 0xd2}
 
+// TransferEvent represents "Transfer" event emitted by the contract.
+type TransferEvent struct {
+	From util.Uint160
+	To util.Uint160
+	Amount *big.Int
+}
+
 // Invoker is used by ContractReader to call various safe methods.
 type Invoker interface {
 	nep17.Invoker
@@ -44,3 +56,87 @@ func New(actor Actor) *Contract {
 	var nep17t = nep17.New(actor, Hash)
 	return &Contract{ContractReader{nep17t.TokenReader, actor}, nep17t.TokenWriter, actor}
 }
+
+// TransferEventsFromApplicationLog retrieves a set of all emitted events
+// with "Transfer" name from the provided ApplicationLog.
+func TransferEventsFromApplicationLog(log *result.ApplicationLog) ([]*TransferEvent, error) {
+	if log == nil {
+		return nil, errors.New("nil application log")
+	}
+
+	var res []*TransferEvent
+	for i, ex := range log.Executions {
+		for j, e := range ex.Events {
+			if e.Name != "Transfer" {
+				continue
+			}
+			event := new(TransferEvent)
+			err := event.FromStackItem(e.Item)
+			if err != nil {
+				return nil, fmt.Errorf("failed to deserialize TransferEvent from stackitem (execution %d, event %d): %w", i, j, err)
+			}
+			res = append(res, event)
+		}
+	}
+
+	return res, nil
+}
+
+// FromStackItem converts provided stackitem.Array to TransferEvent and
+// returns an error if so.
+func (e *TransferEvent) FromStackItem(item *stackitem.Array) error {
+	if item == nil {
+		return errors.New("nil item")
+	}
+	arr, ok := item.Value().([]stackitem.Item)
+	if !ok {
+		return errors.New("not an array")
+	}
+	if len(arr) != 3 {
+		return errors.New("wrong number of structure elements")
+	}
+
+	var (
+		index = -1
+		err error
+	)
+	index++
+	e.From, err = func (item stackitem.Item) (util.Uint160, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		u, err := util.Uint160DecodeBytesBE(b)
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		return u, nil
+	} (arr[index])
+	if err != nil {
+		return fmt.Errorf("field From: %w", err)
+	}
+
+	index++
+	e.To, err = func (item stackitem.Item) (util.Uint160, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		u, err := util.Uint160DecodeBytesBE(b)
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		return u, nil
+	} (arr[index])
+	if err != nil {
+		return fmt.Errorf("field To: %w", err)
+	}
+
+	index++
+	e.Amount, err = arr[index].TryInteger()
+	if err != nil {
+		return fmt.Errorf("field Amount: %w", err)
+	}
+
+	return nil
+}

cli/smartcontract/testdata/nameservice/nns.go

@@ -2,6 +2,8 @@
 package nameservice
 
 import (
+	"errors"
+	"fmt"
 	"github.com/google/uuid"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/neorpc/result"
@@ -16,6 +18,28 @@ import (
 // Hash contains contract hash.
 var Hash = util.Uint160{0xde, 0x46, 0x5f, 0x5d, 0x50, 0x57, 0xcf, 0x33, 0x28, 0x47, 0x94, 0xc5, 0xcf, 0xc2, 0xc, 0x69, 0x37, 0x1c, 0xac, 0x50}
 
+// TransferEvent represents "Transfer" event emitted by the contract.
+type TransferEvent struct {
+	From util.Uint160
+	To util.Uint160
+	Amount *big.Int
+	TokenId []byte
+}
+
+// SetAdminEvent represents "SetAdmin" event emitted by the contract.
+type SetAdminEvent struct {
+	Name string
+	OldAdmin util.Uint160
+	NewAdmin util.Uint160
+}
+
+// RenewEvent represents "Renew" event emitted by the contract.
+type RenewEvent struct {
+	Name string
+	OldExpiration *big.Int
+	NewExpiration *big.Int
+}
+
 // Invoker is used by ContractReader to call various safe methods.
 type Invoker interface {
 	nep11.Invoker
@@ -320,3 +344,259 @@ func (c *Contract) DeleteRecordTransaction(name string, typev *big.Int) (*transa
 func (c *Contract) DeleteRecordUnsigned(name string, typev *big.Int) (*transaction.Transaction, error) {
 	return c.actor.MakeUnsignedCall(Hash, "deleteRecord", nil, name, typev)
 }
+
+// TransferEventsFromApplicationLog retrieves a set of all emitted events
+// with "Transfer" name from the provided ApplicationLog.
+func TransferEventsFromApplicationLog(log *result.ApplicationLog) ([]*TransferEvent, error) {
+	if log == nil {
+		return nil, errors.New("nil application log")
+	}
+
+	var res []*TransferEvent
+	for i, ex := range log.Executions {
+		for j, e := range ex.Events {
+			if e.Name != "Transfer" {
+				continue
+			}
+			event := new(TransferEvent)
+			err := event.FromStackItem(e.Item)
+			if err != nil {
+				return nil, fmt.Errorf("failed to deserialize TransferEvent from stackitem (execution %d, event %d): %w", i, j, err)
+			}
+			res = append(res, event)
+		}
+	}
+
+	return res, nil
+}
+
+// FromStackItem converts provided stackitem.Array to TransferEvent and
+// returns an error if so.
+func (e *TransferEvent) FromStackItem(item *stackitem.Array) error {
+	if item == nil {
+		return errors.New("nil item")
+	}
+	arr, ok := item.Value().([]stackitem.Item)
+	if !ok {
+		return errors.New("not an array")
+	}
+	if len(arr) != 4 {
+		return errors.New("wrong number of structure elements")
+	}
+
+	var (
+		index = -1
+		err error
+	)
+	index++
+	e.From, err = func (item stackitem.Item) (util.Uint160, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		u, err := util.Uint160DecodeBytesBE(b)
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		return u, nil
+	} (arr[index])
+	if err != nil {
+		return fmt.Errorf("field From: %w", err)
+	}
+
+	index++
+	e.To, err = func (item stackitem.Item) (util.Uint160, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		u, err := util.Uint160DecodeBytesBE(b)
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		return u, nil
+	} (arr[index])
+	if err != nil {
+		return fmt.Errorf("field To: %w", err)
+	}
+
+	index++
+	e.Amount, err = arr[index].TryInteger()
+	if err != nil {
+		return fmt.Errorf("field Amount: %w", err)
+	}
+
+	index++
+	e.TokenId, err = arr[index].TryBytes()
+	if err != nil {
+		return fmt.Errorf("field TokenId: %w", err)
+	}
+
+	return nil
+}
+
+// SetAdminEventsFromApplicationLog retrieves a set of all emitted events
+// with "SetAdmin" name from the provided ApplicationLog.
+func SetAdminEventsFromApplicationLog(log *result.ApplicationLog) ([]*SetAdminEvent, error) {
+	if log == nil {
+		return nil, errors.New("nil application log")
+	}
+
+	var res []*SetAdminEvent
+	for i, ex := range log.Executions {
+		for j, e := range ex.Events {
+			if e.Name != "SetAdmin" {
+				continue
+			}
+			event := new(SetAdminEvent)
+			err := event.FromStackItem(e.Item)
+			if err != nil {
+				return nil, fmt.Errorf("failed to deserialize SetAdminEvent from stackitem (execution %d, event %d): %w", i, j, err)
+			}
+			res = append(res, event)
+		}
+	}
+
+	return res, nil
+}
+
+// FromStackItem converts provided stackitem.Array to SetAdminEvent and
+// returns an error if so.
+func (e *SetAdminEvent) FromStackItem(item *stackitem.Array) error {
+	if item == nil {
+		return errors.New("nil item")
+	}
+	arr, ok := item.Value().([]stackitem.Item)
+	if !ok {
+		return errors.New("not an array")
+	}
+	if len(arr) != 3 {
+		return errors.New("wrong number of structure elements")
+	}
+
+	var (
+		index = -1
+		err error
+	)
+	index++
+	e.Name, err = func (item stackitem.Item) (string, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return "", err
+		}
+		if !utf8.Valid(b) {
+			return "", errors.New("not a UTF-8 string")
+		}
+		return string(b), nil
+	} (arr[index])
+	if err != nil {
+		return fmt.Errorf("field Name: %w", err)
+	}
+
+	index++
+	e.OldAdmin, err = func (item stackitem.Item) (util.Uint160, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		u, err := util.Uint160DecodeBytesBE(b)
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		return u, nil
+	} (arr[index])
+	if err != nil {
+		return fmt.Errorf("field OldAdmin: %w", err)
+	}
+
+	index++
+	e.NewAdmin, err = func (item stackitem.Item) (util.Uint160, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		u, err := util.Uint160DecodeBytesBE(b)
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		return u, nil
+	} (arr[index])
+	if err != nil {
+		return fmt.Errorf("field NewAdmin: %w", err)
+	}
+
+	return nil
+}
+
+// RenewEventsFromApplicationLog retrieves a set of all emitted events
+// with "Renew" name from the provided ApplicationLog.
+func RenewEventsFromApplicationLog(log *result.ApplicationLog) ([]*RenewEvent, error) {
+	if log == nil {
+		return nil, errors.New("nil application log")
+	}
+
+	var res []*RenewEvent
+	for i, ex := range log.Executions {
+		for j, e := range ex.Events {
+			if e.Name != "Renew" {
+				continue
+			}
+			event := new(RenewEvent)
+			err := event.FromStackItem(e.Item)
+			if err != nil {
+				return nil, fmt.Errorf("failed to deserialize RenewEvent from stackitem (execution %d, event %d): %w", i, j, err)
+			}
+			res = append(res, event)
+		}
+	}
+
+	return res, nil
+}
+
+// FromStackItem converts provided stackitem.Array to RenewEvent and
+// returns an error if so.
+func (e *RenewEvent) FromStackItem(item *stackitem.Array) error {
+	if item == nil {
+		return errors.New("nil item")
+	}
+	arr, ok := item.Value().([]stackitem.Item)
+	if !ok {
+		return errors.New("not an array")
+	}
+	if len(arr) != 3 {
+		return errors.New("wrong number of structure elements")
+	}
+
+	var (
+		index = -1
+		err error
+	)
+	index++
+	e.Name, err = func (item stackitem.Item) (string, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return "", err
+		}
+		if !utf8.Valid(b) {
+			return "", errors.New("not a UTF-8 string")
+		}
+		return string(b), nil
+	} (arr[index])
+	if err != nil {
+		return fmt.Errorf("field Name: %w", err)
+	}
+
+	index++
+	e.OldExpiration, err = arr[index].TryInteger()
+	if err != nil {
+		return fmt.Errorf("field OldExpiration: %w", err)
+	}
+
+	index++
+	e.NewExpiration, err = arr[index].TryInteger()
+	if err != nil {
+		return fmt.Errorf("field NewExpiration: %w", err)
+	}
+
+	return nil
+}

cli/smartcontract/testdata/nex/nex.go

@@ -2,17 +2,36 @@
 package nextoken
 
 import (
+	"errors"
+	"fmt"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
+	"github.com/nspcc-dev/neo-go/pkg/neorpc/result"
 	"github.com/nspcc-dev/neo-go/pkg/rpcclient/nep17"
 	"github.com/nspcc-dev/neo-go/pkg/rpcclient/unwrap"
 	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
 	"math/big"
 )
 
 // Hash contains contract hash.
 var Hash = util.Uint160{0xa8, 0x1a, 0xa1, 0xf0, 0x4b, 0xf, 0xdc, 0x4a, 0xa2, 0xce, 0xd5, 0xbf, 0xc6, 0x22, 0xcf, 0xe8, 0x9, 0x7f, 0xa6, 0xa2}
 
+// TransferEvent represents "Transfer" event emitted by the contract.
+type TransferEvent struct {
+	From util.Uint160
+	To util.Uint160
+	Amount *big.Int
+}
+
+// OnMintEvent represents "OnMint" event emitted by the contract.
+type OnMintEvent struct {
+	From util.Uint160
+	To util.Uint160
+	Amount *big.Int
+	SwapId *big.Int
+}
+
 // Invoker is used by ContractReader to call various safe methods.
 type Invoker interface {
 	nep17.Invoker
@@ -229,3 +248,177 @@ func (c *Contract) UpdateCapTransaction(newCap *big.Int) (*transaction.Transacti
 func (c *Contract) UpdateCapUnsigned(newCap *big.Int) (*transaction.Transaction, error) {
 	return c.actor.MakeUnsignedCall(Hash, "updateCap", nil, newCap)
 }
+
+// TransferEventsFromApplicationLog retrieves a set of all emitted events
+// with "Transfer" name from the provided ApplicationLog.
+func TransferEventsFromApplicationLog(log *result.ApplicationLog) ([]*TransferEvent, error) {
+	if log == nil {
+		return nil, errors.New("nil application log")
+	}
+
+	var res []*TransferEvent
+	for i, ex := range log.Executions {
+		for j, e := range ex.Events {
+			if e.Name != "Transfer" {
+				continue
+			}
+			event := new(TransferEvent)
+			err := event.FromStackItem(e.Item)
+			if err != nil {
+				return nil, fmt.Errorf("failed to deserialize TransferEvent from stackitem (execution %d, event %d): %w", i, j, err)
+			}
+			res = append(res, event)
+		}
+	}
+
+	return res, nil
+}
+
+// FromStackItem converts provided stackitem.Array to TransferEvent and
+// returns an error if so.
+func (e *TransferEvent) FromStackItem(item *stackitem.Array) error {
+	if item == nil {
+		return errors.New("nil item")
+	}
+	arr, ok := item.Value().([]stackitem.Item)
+	if !ok {
+		return errors.New("not an array")
+	}
+	if len(arr) != 3 {
+		return errors.New("wrong number of structure elements")
+	}
+
+	var (
+		index = -1
+		err error
+	)
+	index++
+	e.From, err = func (item stackitem.Item) (util.Uint160, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		u, err := util.Uint160DecodeBytesBE(b)
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		return u, nil
+	} (arr[index])
+	if err != nil {
+		return fmt.Errorf("field From: %w", err)
+	}
+
+	index++
+	e.To, err = func (item stackitem.Item) (util.Uint160, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		u, err := util.Uint160DecodeBytesBE(b)
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		return u, nil
+	} (arr[index])
+	if err != nil {
+		return fmt.Errorf("field To: %w", err)
+	}
+
+	index++
+	e.Amount, err = arr[index].TryInteger()
+	if err != nil {
+		return fmt.Errorf("field Amount: %w", err)
+	}
+
+	return nil
+}
+
+// OnMintEventsFromApplicationLog retrieves a set of all emitted events
+// with "OnMint" name from the provided ApplicationLog.
+func OnMintEventsFromApplicationLog(log *result.ApplicationLog) ([]*OnMintEvent, error) {
+	if log == nil {
+		return nil, errors.New("nil application log")
+	}
+
+	var res []*OnMintEvent
+	for i, ex := range log.Executions {
+		for j, e := range ex.Events {
+			if e.Name != "OnMint" {
+				continue
+			}
+			event := new(OnMintEvent)
+			err := event.FromStackItem(e.Item)
+			if err != nil {
+				return nil, fmt.Errorf("failed to deserialize OnMintEvent from stackitem (execution %d, event %d): %w", i, j, err)
+			}
+			res = append(res, event)
+		}
+	}
+
+	return res, nil
+}
+
+// FromStackItem converts provided stackitem.Array to OnMintEvent and
+// returns an error if so.
+func (e *OnMintEvent) FromStackItem(item *stackitem.Array) error {
+	if item == nil {
+		return errors.New("nil item")
+	}
+	arr, ok := item.Value().([]stackitem.Item)
+	if !ok {
+		return errors.New("not an array")
+	}
+	if len(arr) != 4 {
+		return errors.New("wrong number of structure elements")
+	}
+
+	var (
+		index = -1
+		err error
+	)
+	index++
+	e.From, err = func (item stackitem.Item) (util.Uint160, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		u, err := util.Uint160DecodeBytesBE(b)
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		return u, nil
+	} (arr[index])
+	if err != nil {
+		return fmt.Errorf("field From: %w", err)
+	}
+
+	index++
+	e.To, err = func (item stackitem.Item) (util.Uint160, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		u, err := util.Uint160DecodeBytesBE(b)
+		if err != nil {
+			return util.Uint160{}, err
+		}
+		return u, nil
+	} (arr[index])
+	if err != nil {
+		return fmt.Errorf("field To: %w", err)
+	}
+
+	index++
+	e.Amount, err = arr[index].TryInteger()
+	if err != nil {
+		return fmt.Errorf("field Amount: %w", err)
+	}
+
+	index++
+	e.SwapId, err = arr[index].TryInteger()
+	if err != nil {
+		return fmt.Errorf("field SwapId: %w", err)
+	}
+
+	return nil
+}

cli/smartcontract/testdata/verifyrpc/verify.go

@@ -2,14 +2,23 @@
 package verify
 
 import (
+	"errors"
+	"fmt"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
+	"github.com/nspcc-dev/neo-go/pkg/neorpc/result"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
 	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
 )
 
 // Hash contains contract hash.
 var Hash = util.Uint160{0x33, 0x22, 0x11, 0x0, 0xff, 0xee, 0xdd, 0xcc, 0xbb, 0xaa, 0x99, 0x88, 0x77, 0x66, 0x55, 0x44, 0x33, 0x22, 0x11, 0x0}
 
+// HelloWorldEvent represents "Hello world!" event emitted by the contract.
+type HelloWorldEvent struct {
+	Args []any
+}
+
 // Actor is used by Contract to call state-changing methods.
 type Actor interface {
 	MakeCall(contract util.Uint160, method string, params ...any) (*transaction.Transaction, error)
@@ -67,3 +76,68 @@ func (c *Contract) VerifyUnsigned() (*transaction.Transaction, error) {
 	}
 	return c.actor.MakeUnsignedRun(script, nil)
 }
+
+// HelloWorldEventsFromApplicationLog retrieves a set of all emitted events
+// with "Hello world!" name from the provided ApplicationLog.
+func HelloWorldEventsFromApplicationLog(log *result.ApplicationLog) ([]*HelloWorldEvent, error) {
+	if log == nil {
+		return nil, errors.New("nil application log")
+	}
+
+	var res []*HelloWorldEvent
+	for i, ex := range log.Executions {
+		for j, e := range ex.Events {
+			if e.Name != "Hello world!" {
+				continue
+			}
+			event := new(HelloWorldEvent)
+			err := event.FromStackItem(e.Item)
+			if err != nil {
+				return nil, fmt.Errorf("failed to deserialize HelloWorldEvent from stackitem (execution %d, event %d): %w", i, j, err)
+			}
+			res = append(res, event)
+		}
+	}
+
+	return res, nil
+}
+
+// FromStackItem converts provided stackitem.Array to HelloWorldEvent and
+// returns an error if so.
+func (e *HelloWorldEvent) FromStackItem(item *stackitem.Array) error {
+	if item == nil {
+		return errors.New("nil item")
+	}
+	arr, ok := item.Value().([]stackitem.Item)
+	if !ok {
+		return errors.New("not an array")
+	}
+	if len(arr) != 1 {
+		return errors.New("wrong number of structure elements")
+	}
+
+	var (
+		index = -1
+		err error
+	)
+	index++
+	e.Args, err = func (item stackitem.Item) ([]any, error) {
+		arr, ok := item.Value().([]stackitem.Item)
+		if !ok {
+			return nil, errors.New("not an array")
+		}
+		res := make([]any, len(arr))
+		for i := range res {
+			res[i], err = arr[i].Value(), error(nil)
+			if err != nil {
+				return nil, fmt.Errorf("item %d: %w", i, err)
+			}
+		}
+		return res, nil
+	} (arr[index])
+	if err != nil {
+		return fmt.Errorf("field Args: %w", err)
+	}
+
+	return nil
+}

pkg/compiler/codegen.go

@@ -110,7 +110,7 @@ type codegen struct {
 	docIndex map[string]int
 
 	// emittedEvents contains all events emitted by the contract.
-	emittedEvents map[string][][]string
+	emittedEvents map[string][]EmittedEventInfo
 
 	// invokedContracts contains invoked methods of other contracts.
 	invokedContracts map[util.Uint160][]string
@@ -2269,7 +2269,7 @@ func newCodegen(info *buildInfo, pkg *packages.Package) *codegen {
 		initEndOffset:   -1,
 		deployEndOffset: -1,
 
-		emittedEvents:    make(map[string][][]string),
+		emittedEvents:    make(map[string][]EmittedEventInfo),
 		invokedContracts: make(map[util.Uint160][]string),
 		sequencePoints:   make(map[string][]DebugSeqPoint),
 	}

pkg/compiler/compiler.go

@@ -309,6 +309,22 @@ func CompileAndSave(src string, o *Options) ([]byte, error) {
 		if len(di.NamedTypes) > 0 {
 			cfg.NamedTypes = di.NamedTypes
 		}
+		if len(di.EmittedEvents) > 0 {
+			for eventName, eventUsages := range di.EmittedEvents {
+				for typeName, extType := range eventUsages[0].ExtTypes {
+					cfg.NamedTypes[typeName] = extType
+				}
+				for _, p := range eventUsages[0].Params {
+					pname := eventName + "." + p.Name
+					if p.RealType.TypeName != "" {
+						cfg.Overrides[pname] = p.RealType
+					}
+					if p.ExtendedType != nil {
+						cfg.Types[pname] = *p.ExtendedType
+					}
+				}
+			}
+		}
 		data, err := yaml.Marshal(&cfg)
 		if err != nil {
 			return nil, fmt.Errorf("can't marshal bindings configuration: %w", err)
@@ -366,24 +382,23 @@ func CreateManifest(di *DebugInfo, o *Options) (*manifest.Manifest, error) {
 	}
 	if !o.NoEventsCheck {
 		for name := range di.EmittedEvents {
-			ev := m.ABI.GetEvent(name)
-			if ev == nil {
+			expected := m.ABI.GetEvent(name)
+			if expected == nil {
 				return nil, fmt.Errorf("event '%s' is emitted but not specified in manifest", name)
 			}
-			argsList := di.EmittedEvents[name]
-			for i := range argsList {
-				if len(argsList[i]) != len(ev.Parameters) {
+			for _, emitted := range di.EmittedEvents[name] {
+				if len(emitted.Params) != len(expected.Parameters) {
 					return nil, fmt.Errorf("event '%s' should have %d parameters but has %d",
-						name, len(ev.Parameters), len(argsList[i]))
+						name, len(expected.Parameters), len(emitted.Params))
 				}
-				for j := range ev.Parameters {
-					if ev.Parameters[j].Type == smartcontract.AnyType {
+				for j := range expected.Parameters {
+					if expected.Parameters[j].Type == smartcontract.AnyType {
 						continue
 					}
-					expected := ev.Parameters[j].Type.String()
-					if argsList[i][j] != expected {
+					expectedT := expected.Parameters[j].Type
+					if emitted.Params[j].TypeSC != expectedT {
 						return nil, fmt.Errorf("event '%s' should have '%s' as type of %d parameter, "+
-							"got: %s", name, expected, j+1, argsList[i][j])
+							"got: %s", name, expectedT, j+1, emitted.Params[j].TypeSC)
 					}
 				}
 			}

pkg/compiler/debug.go

@@ -29,9 +29,14 @@ type DebugInfo struct {
 	// NamedTypes are exported structured types that have some name (even
 	// if the original structure doesn't) and a number of internal fields.
 	NamedTypes map[string]binding.ExtendedType `json:"-"`
+	// Events are the events that contract is allowed to emit and that have to
+	// be presented in the resulting contract manifest and debug info file.
 	Events []EventDebugInfo `json:"events"`
-	// EmittedEvents contains events occurring in code.
-	EmittedEvents map[string][][]string `json:"-"`
+	// EmittedEvents contains events occurring in code, i.e. events emitted
+	// via runtime.Notify(...) call in the contract code if they have constant
+	// names and doesn't have ellipsis arguments. EmittedEvents are not related
+	// to the debug info and are aimed to serve bindings generation.
+	EmittedEvents map[string][]EmittedEventInfo `json:"-"`
 	// InvokedContracts contains foreign contract invocations.
 	InvokedContracts map[util.Uint160][]string `json:"-"`
 	// StaticVariables contains a list of static variable names and types.
@@ -112,6 +117,14 @@ type DebugParam struct {
 	TypeSC       smartcontract.ParamType `json:"-"`
 }
 
+// EmittedEventInfo describes information about single emitted event got from
+// the contract code. It has the map of extended types used as the parameters to
+// runtime.Notify(...) call (if any) and the parameters info itself.
+type EmittedEventInfo struct {
+	ExtTypes map[string]binding.ExtendedType
+	Params   []DebugParam
+}
+
 func (c *codegen) saveSequencePoint(n ast.Node) {
 	name := "init"
 	if c.scope != nil {

pkg/compiler/inline.go

@@ -7,6 +7,7 @@ import (
 	"go/types"
 
 	"github.com/nspcc-dev/neo-go/pkg/core/interop/runtime"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/binding"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
 	"github.com/nspcc-dev/neo-go/pkg/util"
 	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
@@ -172,11 +173,21 @@ func (c *codegen) processNotify(f *funcScope, args []ast.Expr, hasEllipsis bool)
 		return nil
 	}
 
-	params := make([]string, 0, len(args[1:]))
+	params := make([]DebugParam, 0, len(args[1:]))
 	vParams := make([]*stackitem.Type, 0, len(args[1:]))
+	// extMap holds the extended parameter types used for the given event call.
+	// It will be unified with the common extMap later during bindings config
+	// generation.
+	extMap := make(map[string]binding.ExtendedType)
 	for _, p := range args[1:] {
-		st, vt, _, _ := c.scAndVMTypeFromExpr(p, nil)
-		params = append(params, st.String())
+		st, vt, over, extT := c.scAndVMTypeFromExpr(p, extMap)
+		params = append(params, DebugParam{
+			Name:         "", // Parameter name will be filled in several lines below if the corresponding event exists in the buildinfo.options.
+			Type:         vt.String(),
+			RealType:     over,
+			ExtendedType: extT,
+			TypeSC:       st,
+		})
 		vParams = append(vParams, &vt)
 	}
 
@@ -187,11 +198,13 @@ func (c *codegen) processNotify(f *funcScope, args []ast.Expr, hasEllipsis bool)
 		return nil
 	}
 	var eventFound bool
-	if c.buildInfo.options != nil && c.buildInfo.options.ContractEvents != nil && !c.buildInfo.options.NoEventsCheck {
+	if c.buildInfo.options != nil && c.buildInfo.options.ContractEvents != nil {
 		for _, e := range c.buildInfo.options.ContractEvents {
 			if e.Name == name && len(e.Parameters) == len(vParams) {
 				eventFound = true
 				for i, scParam := range e.Parameters {
+					params[i].Name = scParam.Name
+					if !c.buildInfo.options.NoEventsCheck {
 						expectedType := scParam.Type.ConvertToStackitemType()
 						// No need to cast if the desired type is unknown.
 						if expectedType == stackitem.AnyT ||
@@ -207,16 +220,21 @@ func (c *codegen) processNotify(f *funcScope, args []ast.Expr, hasEllipsis bool)
 							// For other cases the conversion code will be emitted using vParams...
 							vParams[i] = &expectedType
 							// ...thus, update emitted notification info in advance.
-						params[i] = scParam.Type.String()
+							params[i].Type = scParam.Type.String()
+							params[i].TypeSC = scParam.Type
 						}
 					}
 				}
 			}
 		}
-	c.emittedEvents[name] = append(c.emittedEvents[name], params)
+	}
+	c.emittedEvents[name] = append(c.emittedEvents[name], EmittedEventInfo{
+		ExtTypes: extMap,
+		Params:   params,
+	})
 	// Do not enforce perfect expected/actual events match on this step, the final
 	// check wil be performed after compilation if --no-events option is off.
-	if eventFound {
+	if eventFound && !c.buildInfo.options.NoEventsCheck {
 		return vParams
 	}
 	return nil

pkg/smartcontract/binding/generate.go

@@ -62,6 +62,7 @@ type (
 		// smartcontract. The map key has one of the following forms:
 		// - `methodName` for method return value;
 		// - `mathodName.paramName` for method's parameter value.
+		// - `eventName.paramName` for event's parameter value.
 		Types  map[string]ExtendedType `yaml:"types,omitempty"`
 		Output io.Writer               `yaml:"-"`
 	}

pkg/smartcontract/rpcbinding/binding.go

@@ -5,6 +5,7 @@ import (
 	"sort"
 	"strings"
 	"text/template"
+	"unicode"
 
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract/binding"
@@ -17,6 +18,15 @@ import (
 // start and ends with a new line. On adding new block of code to the template, please,
 // ensure that this block has new line at the start and in the end of the block.
 const (
+	eventDefinition = `{{ define "EVENT" }}
+// {{.Name}}Event represents "{{.ManifestName}}" event emitted by the contract.
+type {{.Name}}Event struct {
+	{{- range $index, $arg := .Parameters}}
+	{{toPascalCase .Name}} {{.Type}}
+	{{- end}}
+}
+{{ end }}`
+
 	safemethodDefinition = `{{ define "SAFEMETHOD" }}
 // {{.Name}} {{.Comment}}
 func (c *ContractReader) {{.Name}}({{range $index, $arg := .Arguments -}}
@@ -118,6 +128,7 @@ type {{toTypeName $name}} struct {
 {{- end}}
 }
 {{end}}
+{{- range $e := .CustomEvents }}{{template "EVENT" $e }}{{ end -}}
 {{- if .HasReader}}
 // Invoker is used by ContractReader to call various safe methods.
 type Invoker interface {
@@ -249,9 +260,65 @@ func (res *{{toTypeName $name}}) FromStackItem(item stackitem.Item) error {
 {{- end}}
 	return nil
 }
+{{ end -}}
+{{- range $e := .CustomEvents }}
+// {{$e.Name}}EventsFromApplicationLog retrieves a set of all emitted events
+// with "{{$e.ManifestName}}" name from the provided ApplicationLog.
+func {{$e.Name}}EventsFromApplicationLog(log *result.ApplicationLog) ([]*{{$e.Name}}Event, error) {
+	if log == nil {
+		return nil, errors.New("nil application log")
+	}
+
+	var res []*{{$e.Name}}Event
+	for i, ex := range log.Executions {
+		for j, e := range ex.Events {
+			if e.Name != "{{$e.ManifestName}}" {
+				continue
+			}
+			event := new({{$e.Name}}Event)
+			err := event.FromStackItem(e.Item)
+			if err != nil {
+				return nil, fmt.Errorf("failed to deserialize {{$e.Name}}Event from stackitem (execution %d, event %d): %w", i, j, err)
+			}
+			res = append(res, event)
+		}
+	}
+
+	return res, nil
+}
+
+// FromStackItem converts provided stackitem.Array to {{$e.Name}}Event and
+// returns an error if so.
+func (e *{{$e.Name}}Event) FromStackItem(item *stackitem.Array) error {
+	if item == nil {
+		return errors.New("nil item")
+	}
+	arr, ok := item.Value().([]stackitem.Item)
+	if !ok {
+		return errors.New("not an array")
+	}
+	if len(arr) != {{len $e.Parameters}} {
+		return errors.New("wrong number of structure elements")
+	}
+
+	{{if len $e.Parameters}}var (
+		index = -1
+		err error
+	)
+	{{- range $p := $e.Parameters}}
+	index++
+	e.{{toPascalCase .Name}}, err = {{etTypeConverter .ExtType "arr[index]"}}
+	if err != nil {
+		return fmt.Errorf("field {{toPascalCase .Name}}: %w", err)
+	}
+{{end}}
+{{- end}}
+	return nil
+}
 {{end -}}`
 
 	srcTmpl = bindingDefinition +
+		eventDefinition +
 		safemethodDefinition +
 		methodDefinition
 )
@@ -261,6 +328,7 @@ type (
 		binding.ContractTmpl
 
 		SafeMethods  []SafeMethodTmpl
+		CustomEvents []CustomEventTemplate
 		NamedTypes   map[string]binding.ExtendedType
 
 		IsNep11D  bool
@@ -278,6 +346,25 @@ type (
 		ItemTo         string
 		ExtendedReturn binding.ExtendedType
 	}
+
+	CustomEventTemplate struct {
+		// Name is the event's name that will be used as the event structure name in
+		// the resulting RPC binding. It is a valid go structure name and may differ
+		// from ManifestName.
+		Name string
+		// ManifestName is the event's name declared in the contract manifest.
+		// It may contain any UTF8 character.
+		ManifestName string
+		Parameters   []EventParamTmpl
+	}
+
+	EventParamTmpl struct {
+		binding.ParamTmpl
+
+		// ExtType holds the event parameter's type information provided by Manifest,
+		// i.e. simple types only.
+		ExtType binding.ExtendedType
+	}
 )
 
 // NewConfig initializes and returns a new config instance.
@@ -328,7 +415,7 @@ func Generate(cfg binding.Config) error {
 	}
 
 	ctr.ContractTmpl = binding.TemplateFromManifest(cfg, scTypeToGo)
-	ctr = scTemplateToRPC(cfg, ctr, imports)
+	ctr = scTemplateToRPC(cfg, ctr, imports, scTypeToGo)
 	ctr.NamedTypes = cfg.NamedTypes
 
 	var srcTemplate = template.Must(template.New("generate").Funcs(template.FuncMap{
@@ -340,6 +427,7 @@ func Generate(cfg binding.Config) error {
 		},
 		"toTypeName":   toTypeName,
 		"cutPointer":   cutPointer,
+		"toPascalCase": toPascalCase,
 	}).Parse(srcTmpl))
 
 	return srcTemplate.Execute(cfg.Output, ctr)
@@ -533,7 +621,7 @@ func scTypeToGo(name string, typ smartcontract.ParamType, cfg *binding.Config) (
 	return extendedTypeToGo(et, cfg.NamedTypes)
 }
 
-func scTemplateToRPC(cfg binding.Config, ctr ContractTmpl, imports map[string]struct{}) ContractTmpl {
+func scTemplateToRPC(cfg binding.Config, ctr ContractTmpl, imports map[string]struct{}, scTypeConverter func(string, smartcontract.ParamType, *binding.Config) (string, string)) ContractTmpl {
 	for i := range ctr.Imports {
 		imports[ctr.Imports[i]] = struct{}{}
 	}
@@ -564,6 +652,51 @@ func scTemplateToRPC(cfg binding.Config, ctr ContractTmpl, imports map[string]st
 	if len(cfg.NamedTypes) > 0 {
 		imports["errors"] = struct{}{}
 	}
+	for _, abiEvent := range cfg.Manifest.ABI.Events {
+		eTmp := CustomEventTemplate{
+			// TODO: proper event name is better to be set right into config binding in normal form.
+			Name:         toPascalCase(abiEvent.Name),
+			ManifestName: abiEvent.Name,
+		}
+		var varnames = make(map[string]bool)
+		for i := range abiEvent.Parameters {
+			name := abiEvent.Parameters[i].Name
+			fullPName := abiEvent.Name + "." + name
+			typeStr, pkg := scTypeConverter(fullPName, abiEvent.Parameters[i].Type, &cfg)
+			if pkg != "" {
+				imports[pkg] = struct{}{}
+			}
+			for varnames[name] {
+				name = name + "_"
+			}
+			varnames[name] = true
+
+			var (
+				extType binding.ExtendedType
+				ok      bool
+			)
+			if extType, ok = cfg.Types[fullPName]; !ok {
+				extType = binding.ExtendedType{
+					Base: abiEvent.Parameters[i].Type,
+				}
+			}
+			eTmp.Parameters = append(eTmp.Parameters, EventParamTmpl{
+				ParamTmpl: binding.ParamTmpl{
+					Name: name,
+					Type: typeStr,
+				},
+				ExtType: extType,
+			})
+		}
+		ctr.CustomEvents = append(ctr.CustomEvents, eTmp)
+	}
+
+	if len(ctr.CustomEvents) > 0 {
+		imports["github.com/nspcc-dev/neo-go/pkg/neorpc/result"] = struct{}{}
+		imports["github.com/nspcc-dev/neo-go/pkg/vm/stackitem"] = struct{}{}
+		imports["fmt"] = struct{}{}
+		imports["errors"] = struct{}{}
+	}
 
 	for i := range ctr.SafeMethods {
 		switch ctr.SafeMethods[i].ReturnType {
@@ -693,3 +826,32 @@ func toTypeName(s string) string {
 func addIndent(str string, ind string) string {
 	return strings.ReplaceAll(str, "\n", "\n"+ind)
 }
+
+// toPascalCase removes all non-unicode characters from the provided string and
+// converts it to pascal case using space as delimiter.
+func toPascalCase(s string) string {
+	var res string
+	ss := strings.Split(s, " ")
+	for i := range ss { // TODO: use DecodeRuneInString instead.
+		var word string
+		for _, ch := range ss[i] {
+			var ok bool
+			if len(res) == 0 && len(word) == 0 {
+				ok = unicode.IsLetter(ch)
+			} else {
+				ok = unicode.IsLetter(ch) || unicode.IsDigit(ch) || ch == '_'
+			}
+			if ok {
+				word += string(ch)
+			}
+		}
+		if len(word) > 0 {
+			res += upperFirst(word)
+		}
+	}
+	return res
+}
+
+func upperFirst(s string) string {
+	return strings.ToUpper(s[0:1]) + s[1:]
+}