CODEX
Codex Chain
Codex Chain
CODEX
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Codex Chain Information
Codex Chain Markets
About Codex Chain
Codex Chain is an EVM-equivalent Layer 2 settled on Ethereum, purpose-built for stablecoin payments, FX and settlement. It targets deterministic execution, atomic settlement and high throughput. The chain embeds on-chain compliance and identity via canonical address books and precompiles that bind EOAs to KYB tiers and bank rails. Custom transaction types—OnrampTx and OfframpTx—combine value transfer, rules evaluation and fiat instructions; if any rule fails, execution reverts. A validator set composed of ramp participants provides economic assurance: validators attest to transactions, fulfil the fiat leg off chain and face protocol-level slashing for non-delivery or dishonest sequencing. Market-structure features include cancellation-first sequencing for market makers and second-price clearing of EIP-1559 tips to limit overpayment. Codex runs on the OP Stack, integrates with major custody providers.
Codex Chain is an EVM-equivalent Layer 2 that settles to Ethereum and is purpose-built for stablecoin-native payments, FX and settlement. It is optimised for deterministic execution, atomic settlement and high throughput, rather than general-purpose compute. The chain launched as an OP Stack rollup with a phased roadmap; several features described below are planned or rolling out.
- Stablecoin payments and treasury operations that need predictable execution and fast, atomic settlement
- On- and off-ramping where compliance checks, identity and fiat instructions are enforced during transaction execution
- Stablecoin FX with tighter spreads enabled by cancel-first sequencing and short quote cycles
- Auditable fiat settlement, where validators are economically accountable for fulfilling the fiat leg of approved on-chain ramp transactions
- FX Core: EVM rollup logic that re-prices tips via second-price clearing and uses prioritised cancel queues with FX-aware mempool behaviour
- Compliance integration: canonical smart-contract registries bind EOAs to KYB tiers, documents and bank rails, exposed inside the EVM via custom precompiles
- Fiat-compatible transactions: native
OnrampTxandOfframpTxencode value transfer, compliance evaluation and fiat settlement instructions in one operation; if any rule fails, the transaction reverts before value moves - On-chain address books: a User Address Book maps EOAs to KYB level and linked IBANs; a Ramp Address Book stores ramp-specific business rules
- Embedded compliance logic: precompiles and special opcodes surface verification inside the EVM, enabling atomic enforcement at execution time
- Economic assurance network: validator slashing enforces timely, accurate fiat payout and honest sequencing; validators can offer fast (pre-L1) finality attestations
- Market structure and fees: the sequencer prioritises market-maker cancel transactions to reduce stale-quote risk; EIP-1559 priority fees are cleared at the second-highest bid so unused tip is not paid
- Phase 1 – Limited mainnet: OP Stack rollup, EVM equivalence, ETH gas, early custody integrations, LayerZero messaging, sequencer via Conduit
- Phase 2 – Native stablecoin issuance: deploy natively issued stablecoins (starting with USDC) with direct mint/redeem and custom bridging for issuance flows
- Phase 3 – Core features: validator accountability and slashing, cancellation-first ordering, second-price fee clearing,
OnrampTx/OfframpTx, compliance precompiles - Phase 4 – SDKs and integration tooling: ramp and wallet SDKs, institutional APIs, developer dashboard and formal standards for registering ramps, issuers and validators
Codex Chain is developed by the Codex team. The network is built on the OP Stack; the initial sequencer is operated via Conduit. The validator set is designed to include participating ramps, which are subject to protocol-level slashing tied to real-world fiat delivery obligations.
