v0.3.0 (2018-08-12)

• Added: pay.NewEchoMiddleware(...) - A middleware factory function for Echo (issue #2)
• Added: Bolt DB client (issue #3)
  • Struct pay.BoltClient - Implements the StorageClient interface
  • Factory function NewBoltClient(...)
  • Struct pay.BoltOptions - Options for the BoltClient
  • Var pay.DefaultBoltOptions - a BoltOptions object with default values
• Added: pay.LNclient - An abstraction of a client that connects to a Lightning Network node implementation (like lnd, c-lightning and eclair)
  • Implemented for issue #4, but will be useful for issue #6 as well
• Added: ln.LNDclient - Implements the pay.LNclient interface (issue #4)
  • Factory function ln.NewLNDclient(...)
• Improved: Increased middleware performance by reusing the gRPC connection to the lnd backend (issue #4)
  • With the same setup (local Gin web service, pay.GoMap as storage client, remote lnd, same hardware) it took about 100ms per request before, and takes about 25ms per request now. Measured from the arrival of the initial request until the sending of the response with the Lightning invoice (as logged by Gin).
• Fixed: Success log message mentioned "HandlerFunc" in all middlewares despite it not always being a HandlerFunc
• Fixed: A wrong HTTP status code was used in responses when an internal error occurred (400 Bad Request instead of 500 Internal Server Error)

Breaking changes

Package pay:

• Changed: Renamed pay.InvoiceOptions.Amount to pay.InvoiceOptions.Price to avoid misunderstandings

Package ln (none of these changes should affect anyone, because this package is meant to be used only internally):

• Removed: ln.NewLightningClient(...) - Not required anymore after adding the much more usable ln.NewLNDclient(...).
• Changed: ln.GenerateInvoice(...) from being a function to being a method of ln.LNDclient and removed all lnd connection-related parameters which are part of the LNDclient. (issue #4)
• Changed ln.CheckInvoice(...) from being a function to being a method of ln.LNDclient and removed all lnd connection-related parameters which are part of the LNDclient. (issue #4)