Chrysalis

IOTA 1.5, the Mainnet’s intermediate stage before Coordicide is complete.

Last Update
07 May 2021
Completed goals

Mainnet Launch

Complete
Completed Q2 2021
Chrysalis launched on IOTA mainnet.

WOTS to Ed25519 Transition

Complete
Completed Q2 2021
Moving users away from the WOTS to the Ed25519 signature scheme.

Dust Protection

Complete
Completed Q4 2020
Protecting the network against dust attacks and ledger bloat.

Public testnet

Complete
Completed Q4 2020
live
Public testnet for Chrysalis Part 2

Internal testnet (Part 2)

Complete
Completed Q4 2020
Internal testnet for Chrysalis Part 2

UTXO model

Complete
Completed Q4 2020
Allows for faster and more exact conflict handling, deals with possible scenarios of reattaching invalid transactions. Will allow the protocol to support colored coins in the future.

Reusable addresses

Complete
Completed Q4 2020
By adding support for a second signature scheme, the IOTA protocol will support reusable addresses.

White-flag approach

Complete
Completed Q3 2020
A simpler, conflict-ignoring approach that allows for faster and more efficient tip selection, eliminates certain attacks and significantly reduces the need for reattachments.

Universally-random tip selection

Complete
Completed Q3 2020
Improves the performance of the tip selection algorithm, allowing nodes to find tip transactions faster.

Milestone selection

Complete
Completed Q3 2020
Leads to the network being able to confirm more transactions per second.

Atomic binary transactions

Complete
Completed Q3 2020
Move from the current trinary bundle construct and use simpler atomic binary transactions instead. This will reduce validation requirements, network overhead and maintainability of node software.