Question 1

What is Codex Chain?

Accepted Answer

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.

Question 2

What is Codex Chain used for?

Accepted Answer

- 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

Question 3

Architecture and components

Accepted Answer

- 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 `OnrampTx` and `OfframpTx` encode 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

Question 4

Roadmap

Accepted Answer

- 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

Question 5

Who created Codex Chain?

Accepted Answer

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.