NewServer creates a new server.

WithBroadcastOutbound is the option to broadcast msg outbound.

ErrAction indicates the error of action.

ErrInternalServer indicates the internal server error.

ErrReceipt indicates the error of receipt.

Config represents the config to setup api.

Server provides api for user to query blockchain data.

BroadcastOutbound sends a broadcast message to the whole network.

Option is the option to override the api config.