The AptosBridge

Introduction

In October 2022, LayerZero Labs deployed The AptosBridge as the first bridge into the Aptos ecosystem. It quickly grew to become the biggest bridge on Aptos, and has since done over $300m of volume.

In August 2023, LayerZero posted a proposal to the StargateDAO to initiate the handover of this bridge to the DAO. This vote was finalised on August 26th 2023, whereafter the contracts were handed over to the DAO multisigs.

Architecture

The AptosBridge is currently deployed on Ethereum, BNB Chain, Avalanche, Polygon, Arbitrum, Optimism and Aptos.

A user can bridge any supported asset (USDC, USDT, WETH, WBTC, USDD) from an EVM network into Aptos and receive the same wrapped asset on Aptos.

The AptosBridge also support OFTs that are deployed to Aptos, such as BTC.b and CAKE.

Bridge Time & Fees

Amount of time taken to bridge depends on source chain finality, i.e. how many blocks happen before the bridging message is passed through LayerZero messaging. On Aptos, this number is 260 blocks (~1 minute). This number was reduced from 500,000 blocks following a recent DAO vote.

The abovementioned DAO vote also introduced fees into The AptosBridge. The fee structure is as follows;

• EVM -> Aptos = no fee

• Aptos -> EVM = 7bps

Widget

Teams building on Aptos can provide users easy access to the AptosBridge using the widget at https://theaptosbridge.com/widget.

Data

Stargate's AptosBridge General Dashboard: [TBC]

StargateDAO's accumulated fees on AptosBridge: [TBC]