lukechilds/lightning - lightning - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Vasil Dimov	55173a56b7	Use dedicated type for error codes Before this patch we used `int` for error codes. The problem with `int` is that we try to pass it to/from wire and the size of `int` is not defined by the standard. So a sender with 4-byte `int` would write 4 bytes to the wire and a receiver with 2-byte `int` (for example) would read just 2 bytes from the wire. To resolve this: * Introduce an error code type with a known size: `typedef s32 errcode_t`. * Change all error code macros to constants of type `errcode_t`. Constants also play better with gdb - it would visualize the name of the constant instead of the numeric value. * Change all functions that take error codes to take the new type `errcode_t` instead of `int`. * Introduce towire / fromwire functions to send / receive the newly added type `errcode_t` and use it instead of `towire_int()`. In addition: * Remove the now unneeded `towire_int()`. * Replace a hardcoded error code `-2` with a new constant `INVOICE_EXPIRED_DURING_WAIT` (903). Changelog-Changed: The waitinvoice command would now return error code 903 to designate that the invoice expired during wait, instead of the previous -2	5 years ago
Rusty Russell	819078fe18	param: make command_fail/command_success WARN_UNUSED_RESULT. This causes a compiler warning if we don't do something with the result (hopefully return immediately!). We use was_pending() to ignore the result in the case where we complete a command in a callback (thus really do want to ignore the result). This actually fixes one bug: we didn't return after command_fail in json_getroute with a bad seed value. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>	6 years ago
Rusty Russell	93bf7c4839	param: make command sinks (fail/success) return a special type. These routines free the 'struct command': a common coding error is not to return immediately. To catch this, we make them return a non-NULL 'struct command_result *', and we're going to make the command handlers return the same (to encourage 'return command_fail(...)'-style usage). We also provide two sources for external use: 1. command_param_failed() when param() fails. 2. command_its_complicated() for some complex cases. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>	6 years ago
Rusty Russell	3f16c9a665	param: abstract 'struct command' so param doesn't need to access it. I want to use param functions in plugins, and they don't have struct command. I had to use a special arg to param() for check to flag it as allowing extra parameters, rather than adding a one-use accessor. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>	6 years ago