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
	VM            *vm.VM
	Functions     [][]Function
}

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

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

type Function struct {
	ID   uint32
	Name string
	Func func(*Context) error
	// DisallowCallback is true iff syscall can't be used in a callback.
	DisallowCallback bool
	// ParamCount is a number of function parameters.
	ParamCount int
	Price      int64
	// 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
}