package manifest import ( "encoding/hex" "encoding/json" "github.com/nspcc-dev/neo-go/pkg/crypto/hash" "github.com/nspcc-dev/neo-go/pkg/crypto/keys" "github.com/nspcc-dev/neo-go/pkg/smartcontract" "github.com/nspcc-dev/neo-go/pkg/util" ) // Parameter represents smartcontract's parameter's definition. type Parameter struct { Name string `json:"name"` Type smartcontract.ParamType `json:"type"` } // Event is a description of a single event. type Event struct { Name string `json:"name"` Parameters []Parameter `json:"parameters"` } // Group represents a group of smartcontracts identified by a public key. // Every SC in a group must provide signature of it's hash to prove // it belongs to a group. type Group struct { PublicKey *keys.PublicKey `json:"pubkey"` Signature []byte `json:"signature"` } type groupAux struct { PublicKey string `json:"pubkey"` Signature []byte `json:"signature"` } // Method represents method's metadata. type Method struct { Name string `json:"name"` Offset int `json:"offset"` Parameters []Parameter `json:"parameters"` ReturnType smartcontract.ParamType `json:"returntype"` Safe bool `json:"safe"` } // NewParameter returns new parameter of specified name and type. func NewParameter(name string, typ smartcontract.ParamType) Parameter { return Parameter{ Name: name, Type: typ, } } // IsValid checks whether group's signature corresponds to the given hash. func (g *Group) IsValid(h util.Uint160) bool { return g.PublicKey.Verify(g.Signature, hash.Sha256(h.BytesBE()).BytesBE()) } // MarshalJSON implements json.Marshaler interface. func (g *Group) MarshalJSON() ([]byte, error) { aux := &groupAux{ PublicKey: hex.EncodeToString(g.PublicKey.Bytes()), Signature: g.Signature, } return json.Marshal(aux) } // UnmarshalJSON implements json.Unmarshaler interface. func (g *Group) UnmarshalJSON(data []byte) error { aux := new(groupAux) if err := json.Unmarshal(data, aux); err != nil { return err } b, err := hex.DecodeString(aux.PublicKey) if err != nil { return err } pub := new(keys.PublicKey) if err := pub.DecodeBytes(b); err != nil { return err } g.PublicKey = pub g.Signature = aux.Signature return nil }