CallService (xcall 0.6.2 API)

All Known Implementing Classes:

CallServiceImpl
```
public interface CallService
```

Field Summary

Fields
Modifier and Type Field Description

static java.lang.String NAME
The name of CallService.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`executeCall(java.math.BigInteger _reqId, byte[] _data)`	Executes the requested call message.
`void`	`executeRollback(java.math.BigInteger _sn)`	Rollbacks the caller state of the request '_sn'.
`java.math.BigInteger`	`sendCallMessage(java.lang.String _to, byte[] _data, byte[] _rollback)`	Sends a call message to the contract on the destination chain.

- Field Detail
  - NAME
```
static final java.lang.String NAME
```
    The name of CallService.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - sendCallMessage
```
java.math.BigInteger sendCallMessage(java.lang.String _to,
                                     byte[] _data,
                                     byte[] _rollback)
```
    Sends a call message to the contract on the destination chain.
    
    Parameters:
    
    _to - The BTP address of the callee on the destination chain
    
    _data - The calldata specific to the target contract
    
    _rollback - (Optional) The data for restoring the caller state when an error occurred
    
    Returns:
    
    The serial number of the request
  - executeRollback
```
void executeRollback(java.math.BigInteger _sn)
```
    Rollbacks the caller state of the request '_sn'.
    
    Parameters:
    
    _sn - The serial number of the previous request
  - executeCall
```
void executeCall(java.math.BigInteger _reqId,
                 byte[] _data)
```
    Executes the requested call message.
    
    Parameters:
    
    _reqId - The request id
    
    _data - The calldata