Onyx Protocol today announced a major strategic shift: the Layer 3 (XCN Ledger) will be deprecated and sunset on December 31, 2026, as all development resources are redirected to the Onyx Layer 1. The Ethereum-native ERC-20 contract for XCN remains unchanged, and holders can seamlessly bridge their XCN to Layer 1 to participate in staking, applications, and future network functions.
Deprecation Timeline and Rationale
The Layer 3, built on Arbitrum Orbit with Base as its settlement layer, successfully demonstrated XCN as a native gas token, delivered low-cost transactions, and fostered a growing developer ecosystem through integrations with partners including Privy, Thirdweb, Tenderly, Superbridge, and Chain. However, with the launch of the Onyx Layer 1 and the recent introduction of Onyx Mesh—a decentralized banking network developed in partnership with Chain—the team has concluded that a single, sovereign blockchain can now support both decentralized applications and institutional financial systems.
Onyx Mesh enables banks and financial institutions to securely coordinate transactions, verify events through decentralized consensus, and maintain privacy while benefiting from public blockchain security. By consolidating around Layer 1, Onyx can focus engineering resources on one network, accelerating protocol development, strengthening validator participation, simplifying the developer experience, and unifying ecosystem liquidity. Rather than maintaining multiple execution environments, developers and users will benefit from a single blockchain purpose-built for financial infrastructure.
Implications for XCN and Ecosystem
Importantly, this transition does not change XCN itself. The Ethereum ERC-20 contract remains the primary representation of XCN, and holders will continue to bridge assets between Ethereum and the Onyx Layer 1 as needed. The Layer 3 was an important milestone in Onyx’s growth, but the future is now centered on a unified Layer 1. By combining Ethereum’s liquidity with a purpose-built Layer 1 for institutional finance, Onyx is creating the foundation for the next generation of decentralized financial infrastructure.
Market observers view this as a convergence trend in the Layer 2/3 space: as projects find multi-layer maintenance costly, turning to a single sovereign chain becomes rational. Onyx’s decision will directly affect XCN’s tokenomics and cross-chain ecosystem, warranting close attention from investors and developers.