Synapse Protocol (synapse)

Cross-chain bridge and DEX with multi-chain AMM pools. Supports token swaps and bridging via SynapseBridge and CCTP router.

Fact	Value
Category	Bridges
Family	none
Namespace	`Synapse` on ethereum, optimism, polygon, base, arbitrum, avalanche
Chains	ethereum, optimism, polygon, base, arbitrum, avalanche

Notes

deposit: For canonical tokens supported directly by the bridge
depositAndSwap: For bridging with an automatic swap on destination (e.g. bridge nUSD, swap to USDC on arrival)
redeem: For synthetic bridge tokens (nUSD, nETH) — burns on source, mints on destination
Also supports CCTP-based USDC bridging via separate cctpRouter contract
Finality: typically 5-15 minutes depending on route
Requires ERC-20 approval to the SynapseBridge

On Ethereum, Synapse is a namespace: its contracts need no import.

function main() {
  // Ethereum's cctpRouter, `0x12715a66773BD9C54534a01aBF01d05F6B4Bd35E`.
  require(Synapse.CctpRouter != 0);
}

Chain	Contract	Address	In a program
Ethereum	cctpRouter	`0x12715a66773BD9C54534a01aBF01d05F6B4Bd35E`	`Synapse.CctpRouter`
Ethereum	synapseBridge	`0x2796317b0fF8538F253012862c06787Adfb8cEb6`	`Synapse.SynapseBridge`
Optimism	synapseBridge	`0xAf41a65F786339e7911F4acDAD6BD49426F2Dc6b`	`Synapse.SynapseBridge`
Polygon	synapseBridge	`0x8F5BBB2BB8c2Ee94639E55d5F41de9b4839C1280`	`Synapse.SynapseBridge`
Base	synapseBridge	`0xf07d1C752fAb503E47FEF309bf14fbDD3E867089`	`Synapse.SynapseBridge`
Arbitrum One	synapseBridge	`0x6F4e8eBa4D337f874Ab57478AcC2Cb5BACdc19c9`	`Synapse.SynapseBridge`
Avalanche C-Chain	synapseBridge	`0xC05e61d0E7a63D27546389B7aD62FdFf5A91aACE`	`Synapse.SynapseBridge`

import SynapseBridgeABI from "./protocols/synapse/SynapseBridgeABI.json"; Speaks for: synapseBridge.

deposit(address to, uint256 chainId, address token, uint256 amount)
depositAndSwap(address to, uint256 chainId, address token, uint256 amount, uint8 tokenIndexFrom, uint8 tokenIndexTo, uint256 minDy, uint256 deadline)
redeem(address to, uint256 chainId, address token, uint256 amount)