By EZ in Releases — Oct 19, 2023

Taproot Assets v0.3.0-alpha: First Mainnet Release

Starting with the release of version v0.3.0 the Taproot Assets daemon does support the Bitcoin mainnet.

"Today we're excited to release the mainnet alpha of the Taproot Assets daemon, providing a feature-complete developer experience for issuing, managing, and exploring stablecoins or other assets on the bitcoin blockchain."
"This release also begins forward compatibility, which means the protocol will not have any more breaking changes that would affect assets issued on mainnet."
"This mainnet release of the protocol supports on-chain functionality, with Lightning support coming soon."
"IMPORTANT NOTE: To avoid loss of funds, it's imperative that you read the Operational Safety Guidelines before using tapd on mainnet!"

What’s new

Automatically generated test vectors for all TLV encodings and MS-SMT tree and virtual machine logic
Chain re-organization protection and automatic proof re-generation
Add ability to burn assets
Asset-level coin locking/leasing
Fully implemented Multiverse tree structure to support syncing both issuance and transfer proofs
New type of proof courier: Universe RPC courier, transfers proofs from sender to recipient via any public or private universe server
Proof courier type and server address can now be specified
Prometheus metrics export support
Added load test utility for generating asset mints and transfers on regtest
Improved universe sync speed by batching database calls
Easy distinguishability between proof files and individual proofs with magic byte prefixes
Future proof all data structures by adding version fields
Tapscript support for group keys to enable richer reissuance workflows
Enable mainnet as a supported Bitcoin network for tapd
Many many bugs fixed and a lot of code cleaned up

Support for exporting and importing proofs for individual transfers to/from Universes
The DecodeProof RPC now supports both proof files and individual proofs
Support for custom asset metadata types
Metadata is limited to 1 MiB
Statistics on the total number of issuances and asset groups for Universe servers
Better information in the Universe individual asset statistics RPC responses
Added more information on the minting RPC calls, can now see assets in batch and correct batch state
Runtime configuration of universe sync settings
Asset related RPCs now have the asset’s version as a new field
Proof related Universe RPC calls now expect a proof type alongside the ID to distinguish between issuance and transfer proofs

There is no migration path, you HAVE to start with a fresh data directory by completely deleting the ~/.tapd directory.
The public Lightning Labs Universe server was reset as well, all assets minted before v0.3.0-alpha cannot be used anymore
This is the last breaking version, all assets minted with v0.3.0-alpha and later will be working in all future versions
The ImportProof RPC call is now only available in development mode, since transferring proofs over private Universe servers is now possible and should be used
Issuance proofs now have two new fields, one for the genesis reveal and one for the group key reveal

Full Changelog: v0.2.3...v0.3.0