Ronin Ethereum Migration Goes Live on May 12

May 12, 2025 — Ronin, the gaming-focused blockchain behind Axie Infinity, is executing a hard fork today at block 55,577,490 to complete its transition from an independent sidechain to an Ethereum Layer 2. The migration will trigger around 15:16 UTC, with all Ronin transactions paused for roughly 10 hours, covering transfers, swaps, NFT trades, and smart contract interactions.

Immediate Details & Direct Quotes

The migration shifts Ronin from a nine-validator sidechain model to an OP Stack rollup infrastructure that links the network directly to Ethereum for settlement and data availability. Node operators on Ronin mainnet must upgrade to release 1.2.2 before the hard fork.

Ronin described the move as plugging “back into the mothership,” according to the project’s announcement. The new structure replaces the older validator system with OP Stack technology, bringing Ronin into the same ecosystem as other chains including Celo and Fraxtal.

The network will also integrate EigenDA to handle data availability for transactions, storing data off-chain while keeping it verifiable and accessible to Ethereum. This change directly addresses security concerns associated with the sidechain model, where only a small number of centrally-managed validators secured the network.

Market Context & Reaction

RON token inflation will drop sharply from over 20% annually to below 1% under a new Proof of Distribution model. Marketplace fees on Ronin will also rise from 0.5% to 1.25%, with 90 million RON tokens previously allocated for staking redirected to the Ronin treasury.

The migration represents a significant restructuring of tokenomics for the Ronin ecosystem. Reduced inflation rewards validator incentives while redirecting capital to the project’s treasury for ongoing development and operations. Broader market reaction details were not immediately available as the migration window remains active.

As of May 12, the hard fork proceeds as planned with the 10-hour downtime window expected to conclude later today. The transition brings Ronin into the OP Stack ecosystem, positioning it alongside other chains that have adopted Ethereum-based scaling infrastructure.

Background & Historical Context

While operating as an independent sidechain in March 2022, Ronin suffered the largest DeFi bridge exploit in history, with $625 million in ETH and USDC drained from its bridge. The attack exposed structural risks of the sidechain model, where only a small number of validators were responsible for network security.

The Layer 2 transition directly addresses those concerns by inheriting Ethereum’s security rather than relying on Ronin’s own validator set. The Ronin bridge previously migrated to Chainlink’s cross-chain interoperability protocol in April 2025 as an earlier step in securing its infrastructure ahead of the full L2 move.

The migration was initially announced in April 2025, with the team working through technical preparations including node operator upgrades and testing of the new OP Stack infrastructure.

What This Means

The transition represents a fundamental shift in Ronin’s security model, moving from an independent chain reliant on its own validators to one that inherits Ethereum’s proven security guarantees. This reduces the risk of future bridge exploits that plagued the sidechain architecture.

RON token holders will see significantly lower inflation rates, which could support long-term token value if demand remains stable. However, the increase in marketplace fees from 0.5% to 1.25% may impact transaction costs for users trading NFTs and other assets on the network.

Looking ahead, Ronin plans to continue operating as a gaming-focused chain within the broader Ethereum ecosystem. The migration to OP Stack infrastructure opens integration possibilities with other chains in the ecosystem and provides access to Ethereum’s liquidity and developer tools.

The 10-hour downtime window means users should not attempt to transact on Ronin until the migration completes and network operations resume.

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