Architectural transition: from OFT to CCT
The Super Portal's current topology connects Ethereum and Solana for MNT movement; the system is being suspended during a migration window tentatively scheduled for 9–15 July 2026. Under the new configuration, MNT adopts the Cross-Chain Token (CCT) standard, transferring all transfer controls to Mantle-administered contracts and cross-chain token pools. The legacy LayerZero OFT path has been deprecated. Per the announcement, user balances on Ethereum and Solana, alongside interactions on Byreal and Bybit, remain unaffected, with transfers resuming automatically once the state transition completes.
What changes at the protocol layer is the verification substrate. Chainlink CCIP's defense-in-depth design stacks independent oracle committees, a dedicated Risk Management Network, and configurable rate-limiting against anomalous transfer behavior — replacing the optimistic message-passing assumption that characterized the prior OFT integration. Mantle retains full autonomy over its smart contracts and pool configuration, decoupling control-plane ownership from the message-validity plane.
Routing decision and its protocol implications
The selection criterion, as stated by Mantle, was a security review of cross-chain infrastructure rather than cost optimization or throughput tuning. CCIP's operational record — approximately 70% of DeFi secured and $32+ trillion in onchain value transacted through Chainlink's broader oracle infrastructure — supplies a reference deployment at scale.