Proxy Chain Routing (CCTP v2)

Welcome to the Proxy Chains guide. This document explains how the Centiiv Liquidity Protocol enables seamless, automated stablecoin bridging from external ecosystems to the Stellar blockchain.

What is a Proxy Chain?

A Proxy Chain is a non-Stellar blockchain (such as an EVM chain) where Centiiv automatically orchestrates the cross-chain bridging of incoming assets under the hood.

Instead of requiring users or developers to manually interact with external bridges, configure custom RPCs, or wait for standard transfer finality, Centiiv handles the entire bridging pipeline. Once funds are deposited onto a supported source proxy chain, the protocol immediately routes and mints them onto Stellar, allowing them to interact directly with our core liquidity contracts.

Supported Networks & Assets

We are rolling out support progressively as demand scales. The current network availability is structured as follows:

1. Active Proxy Chains (Live Now)

• Base: Supports both USDC and EURC.
• Arbitrum: Supports USDC.

2. Prioritized Pipeline (Indicate Demand)

• Avalanche, Polygon PoS, and Optimism (OP Mainnet) are fully compatible with our proxy architecture. We will activate these networks as institutional and developer demand grows. If you require immediate access to these chains, please contact our support team to help us prioritize our deployment queue.

3. Roadmap: Aptos

• Aptos is currently on our roadmap. Aptos currently runs on Circle's legacy CCTP V1 contracts. Circle has officially announced a timeline to deploy CCTP V2 (incorporating Fast Transfer and programmable Hooks) to Aptos before the V1 legacy phase-out is completed in mid-2027. Once CCTP V2 is natively live on Aptos, we will enable Aptos proxy routing.

How It Works

When you initialize an offramp request, the process is abstract and handled through a temporary smart account:

1. Request Creation

When calling our request creation endpoint, you simply configure the network parameter to a supported proxy chain (e.g., BASE or ARBITRUM).

2. Under-the-Hood Wallet Provisioning

Centiiv registers your request as a standard Stellar order. Simultaneously, the system dynamically provisions and returns a temporary EVM-compatible smart account address on the source chain you specified.

3. The Deposit Phase

You or your user deposits the specified asset (USDC or EURC) directly into the temporary EVM wallet address.

4. Automated Bridging

As soon as the deposit is detected via our indexing infrastructure, Centiiv initiates the burn-and-mint bridging with gas-sponsored transactions (the temporary wallet does not need ETH/native gas to execute).

5. Fast Attestation & Soroban Minting

Using CCTP V2, we request a Fast Transfer. Within roughly 8 seconds, your funds arrive securely on Stellar, and the request proceeds as a normal Stellar transaction.

Bridging Fees

Because Centiiv utilizes CCTP V2 Fast Transfer to achieve near-instant bridging speeds (~8 seconds instead of waiting the standard 15+ minutes on L2s), a minor protocol fee is charged by the CCTP relayer network. This fee is dynamically calculated and automatically deducted from the bridged token balance during transit.