Project Status
The Token-2022 program is still under audit and not meant for full production use. In the meantime, all clusters have the latest program deployed for testing and development purposes ONLY.
Timeline
Here is the general program timeline and rough ETAs:
| Issue | ETA |
|---|---|
| Code-complete & final audit | Fall 2023 |
| Mainnet recommendation | Winter 2024 (depends on v1.17) |
| More ZK features | Spring 2024 (depends on v1.18) |
| Freeze program | 2024 |
More information: https://github.com/orgs/solana-labs/projects/34
Remaining items
v1.17 with curve syscalls
In order to use confidential tokens, the cluster must run at least version 1.17 with the elliptic curve operations syscalls enabled.
More information: https://github.com/solana-labs/solana/issues/29612
Zero-knowledge proof split
In order to use confidential tokens, the cluster must run at least version 1.17 with the ZK Token proof program enabled.
More information: https://github.com/solana-labs/solana/pull/32613
The ZK Token proof program was recently updated to support the splitting of the longer zero-knowledge proofs into smaller components. The token-2022 program is in the process of active development to properly process the new proof format.
More information: https://github.com/solana-labs/solana-program-library/issues/4817
Future work
Confidential transfers with fee
Due to the transaction size limit, it is not possible to do confidential transfers with a fee. We plan to include that capability with Solana 1.18.
Wallets
To start, wallets need to properly handle the token-2022 program and its accounts, by fetching token-2022 accounts and sending instructions to the proper program.
Next, to use confidential tokens, wallets need to create zero-knowledge proofs, which entails a new transaction flow.
Increased transaction size
To support confidential transfers in one transaction, rather than split up over multiple transactions, the Solana network must accept transactions with a larger payload.
More information: https://github.com/orgs/solana-labs/projects/16
Upgradability
To facilitate deploying updates and security fixes, the program deployment remains upgradable. Once audits are complete and the program has been stable for six months, the deployment will be marked final and no further upgrades will be possible.