Fortuna Major Release 4.0.0 is Out!

albena.chain · July 24, 2019, 10:30am

Hello everyone,

Did you hear that Fortuna 4.0.0 was released a few days ago?

Find it on GitHub here:

This is a major Fortuna release, mainly aimed at easing development of applications using state channels in the presence of generic accounts.

It introduces some backward incompatibilities - see the release notes here:

github.com

aeternity/aeternity/blob/v4.0.0/docs/release-notes/RELEASE-NOTES-4.0.0.md

# About this release

[This][this-release] is a major Fortuna release, mainly aimed at easing development of applications using state channels in the presence of generic accounts.
It:
* Introduces State Channel FSM Generalized Accounts awareness. It now fully
  supports creation of meta transactions and verifies them.
* Changes WebSocket API regarding signing transactions: now sign requests
  provide a signed transaction to be signed. Old approach was sending unsigned
  transactions.
* Changes channel reestablish checks: for on-chain transactions authentication
  can not always be checked at current chain top. Check is done, if the last
  transaction is an on-chain one, it must be present in on-chain.
* Changes the off-chain protocol to accommodate Generalized Account
  authentication methods. This is off-chain noise protocol breaking change.
* Enhances the state Channels WebSocket API, that now supports starting a responder with `"initiator_id": "any"`.
  The responder instance will get the proper initiator Id from the `channel_open` message once a
  connection is established.
* Enables multiple different State Channel responder pubkeys to share the same listen port.
* Changes the `channel_open` and `channel_accept` messages to contain both the initiator and
  responder public keys. This is not backwards compatible for the `noise` protocol.

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Best,
Albena