Combining to signals created from delegate callbacks where one is a success message and another is a failure. convert the failure into an error signal

LifterDeviceConnector.m

 RACSignal *connectionSignal = [self rac_signalForSelector:@selector(centralManager:didConnectPeripheral:) fromProtocol:@protocol(CBCentralManagerDelegate)];
        
RACSignal *connectionFailureSignal = [[self rac_signalForSelector:@selector(centralManager:didFailToConnectPeripheral:error:) fromProtocol:@protocol(CBCentralManagerDelegate)] flattenMap:^RACStream *(RACTuple *tuple) {
            return [RACSignal error:tuple.third];
        }];
        
RACSignal *completeConnectionSignal = [[RACSignal merge:@[connectionSignal,connectionFailureSignal]] catch:^RACSignal *(NSError *error) {
            //handle the connection failure?
        }];

I was looking for just that! Thanks 👍