interop

type Context struct {
	Chain         blockchainer.Blockchainer
	Container     crypto.Verifiable
	Natives       []Contract
	Trigger       trigger.Type
	Block         *block.Block
	Tx            *transaction.Transaction
	DAO           *dao.Cached
	Notifications []state.NotificationEvent
	Log           *zap.Logger
	Invocations   map[util.Uint160]int
}

type Contract interface {
	Initialize(*Context) error
	Metadata() *ContractMD
}

type ContractMD struct {
	Manifest    manifest.Manifest
	ServiceName string
	ServiceID   uint32
	ContractID  int32
	Script      []byte
	Hash        util.Uint160
	Methods     map[string]MethodAndPrice
}

type Function struct {
	ID    uint32
	Name  string
	Func  func(*Context, *vm.VM) error
	Price int64
	// AllowedTriggers is a set of triggers which are allowed to initiate invocation.
	AllowedTriggers trigger.Type
	// RequiredFlags is a set of flags which must be set during script invocations.
	// Default value is NoneFlag i.e. no flags are required.
	RequiredFlags smartcontract.CallFlag
}

type Method = func(ic *Context, args []stackitem.Item) stackitem.Item

type MethodAndPrice struct {
	Func          Method
	Price         int64
	RequiredFlags smartcontract.CallFlag
}