December 2025 Mintlayer Development Update
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Bitmart.com
Poloniex.com
Italian
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Development
December 2025 Mintlayer Development Update
January 7, 2026
Christopher Luu
Head of Content
December focused on polishing our current offerings, tightening wallet and explorer workflows, and keeping mainnet preparations on schedule. Below is a concise roundup and a few important reminders.
Mojito Wallet (Browser Extension)
Preparing for mainnet integrations with MintFun, RioSwap, and other dApps. Recent work includes:
Bitcoin HD wallet updates, including multiple receive and change addresses
New UTXO selection and fee calculation algorithm
New Addresses page for easier address management
Security hardening, performance improvements, and wallet API optimizations for both BTC and ML
Explorer
Ongoing bug fixes and refinement to improve token views and overall responsiveness.
MintFun
Continued bug fixing and UX refinement on testnet based on community feedback.
RioSwap
Ongoing work toward mainnet readiness. Backend integration is underway so Mojito can drive atomic swap flows directly in the browser and app.
Action for Node Operators
Upgrade to v1.2.0 before the mainnet hard fork scheduled for January 20–21, 2026.
Download Core Node:
After the fork:
Order fills and conclusions will require initial and current balances
Pool decommissioning will require current staker balance data
Token issuance may produce token IDs differently
Notes:
Avoid creating order fills, pool decommissions, or token issuance near the fork height
Simple transfers are not affected
Full node and API server resync will occur after the upgrade
Upgrade guide:
Full Details
ERC-20 Migration Window
The ERC-20 to mainnet ML coin migration window closes on
January 31, 2026
. You can migrate via supported exchanges or the Mintlayer migration portal.
Migrate:
Wallet download:
Step-by-step guide:
ML Migration Guide
In Case You Missed It: 2025 in Review Blog
We moved from core infrastructure to shipping products and public testnets, advanced atomic swap readiness, launched the JavaScript SDK, refreshed Mojito, and brought ZK Thunder to testnet. RioSwap and MintFun testnets went live, and we introduced Mintlayer Web Services for builders and institutions.
Read the recap:
Full 2025 Development Recap
Wrapping Up
December was about stability, refinements, and preparing the path to January’s hard fork. Reminder please update nodes to v1.2.0, complete ERC-20 migrations if needed, and keep testing MintFun and RioSwap on testnet.
You can follow progress on GitHub:
Discover more
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Mintlayer's 2025 development highlights including RioSwap and MintFun testnet launches, ZK Thunder Network deployment, and Mintlayer Web Services introduction.
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