chain

type Chain interface {
	GetContract(addr []byte, contractType string) (interface{}, error)
	NewContract(ctx context.Context, from []byte, contractType string, contractData interface{}) (*transaction.Transaction, error)
	Call(ctx context.Context, from []byte, contractType string, contractAddr []byte, methodName string, value *big.Int, callData interface{}) (*transaction.Transaction, error)
	Query(ctx context.Context, addr []byte, abiString string, methodName string, result interface{}, params ...interface{}) error
	CallWithAbi(ctx context.Context, from []byte, contractAddr []byte, methodName string, value *big.Int, callData interface{}, abiStr string) (*transaction.Transaction, error)
	ConfirmTrans(ctx context.Context, trans *transaction.Transaction, sig []byte) error
	WaitMined(ctx context.Context, trans *transaction.Transaction) error
	BalanceAt(ctx context.Context, addr []byte) (*big.Int, error)
	BalanceAtICST(ctx context.Context, addr []byte) (*big.Int, error)
	PubKeyToAddress(pub *ecdsa.PublicKey) []byte
	UnmarshalPubkey(pub string) (*ecdsa.PublicKey, error)
	MarshalPubKey(pub *ecdsa.PublicKey) string
	GenerateKey(ctx context.Context) (*ecdsa.PrivateKey, error)
	Sign(hash []byte, prv *ecdsa.PrivateKey) (sig []byte, err error)
	Transfer(ctx context.Context, from []byte, to []byte, value *big.Int) (*transaction.Transaction, error)
	TransferICST(ctx context.Context, from []byte, to []byte, value *big.Int) (*transaction.Transaction, error)
	WatchBlocks(ctx context.Context, blockStart *big.Int) (<-chan *transaction.Block, <-chan error)
	WatchICSTTransfer(ctx context.Context, blockStart *big.Int) (<-chan *transaction.Block, <-chan error)

	GetContractEvents(ctx context.Context, addr []byte, fromBlock, toBlock *big.Int, abiString string, eventTypes map[string]reflect.Type) ([]*ContractEvent, error)
}

type ChainType int

type ContractEvent struct {
	Addr      []byte       //contract address
	Name      string       //event name
	T         reflect.Type //type of underlying chain specific contract event
	V         interface{}  //underlying chain specific contract event
	BlockNum  uint64
	BlockHash []byte
	TxIndex   uint64
	TxHash    []byte
	Unwatch   func() `json:"-"` //unwatch the event at any time
}

type ContractType string