# Protocol Architecture

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### CEXISWAP Router Contract instance 

Each supported chain would have a CEXISWAP Router Contract instance acting as the entry point for smart contract on-chain interactions. <br>

### Liquidity Vault instance &#x20;

Each liquidity provider in the CEXISWAP liquidity network has their own Liquidity Vault instance providing both on-chain and off-chain liquidity.<br>

### Trade Oracle service&#x20;

Each liquidity provider in the CEXISWAP liquidity network would operate their own Trade Oracle service which controls the flow of the liquidity provided.<br>

### CEXISWAP API Endpoint

The multi-chain API endpoint encapsulates knowledge about blockchains in an easy-to-use REST API. See the [example code](https://docs.cexiswap.io/cexiswap/api).