Cross-Chain API

How to Aggregate Cross Chain Liquidity?

The problem of swapping assets among multiple blockchains is a problem of liquidity. It is necessary to lock and mint, burn and release assets among multiple platforms, as these are usually wrapped tokens that are used to transfer value among blockchains.

medium.com

This project will create a CrossChain API MVP that allows:

Liquidity Providers (LPs) - that have tokens in Ethereum & BSC to add liquidity in Harmony DEXs using a single API
Swappers - to move their tokens from/to Ethereum and BSC using a single API

The expected deliverables are

Following 4 APIs:

LP-Explore
LP-AddLiquidity
LP-RemoveLiquidity
Swapper-Explore
Swapper-Swap

A client (web-based) that utilizes the aforementioned crosschain apis to explore and perform crosschain activities like adding/removing liquidity, swapping tokens to/from BSC and Ethereum. Work on this client has already started.

Milestones

All functionality is being developed in Production mode, where the API takes hashes of signed transactions, and Development mode, where the server is run locally and the API takes the PK.

Step-by-step LP

~~Add Liquidity (Alpha) - Alpha Version: 10/04/2021~~
~~Remove Liquidity (Alpha) - Alpha Version: 10/04/2021~~
Add Liquidity (Beta) - 10/20/2021
Remove Liquidity (Beta) - 10/20/2021

Step-by-step Swapper

Bridge Approval and Lock - Production and Development (Beta)
Bridge Approval, Deposit and Burn - Production and Development (Beta)
DEX - Viper Swap - Production and Development (Beta)
AWS Deployment (development) - Beta Version: 10/15/2021
DEX - Sushi (Pending) - Beta Version: 10/30/2021
DEX - Kanga (Pending) - Beta Version: TBD

End2end LP

Integration of Add Liquidity functionality into End2End swapper (Pending)

End2end Swapper

Combo API call that bridges assets from ETH BUSD into Harmony BUSD (Harmony Bridged Asset), then swaps Harmony BUSD into bscBUSD (Harmony Bridged Asset) on Viper and finally bridges bscBUSD into BUSD in BSC. (Beta)
Combo API call that bridges assets from BUSD in BSC into bscBUSD (Harmony Bridged Asset), then swaps bscBUSD into Harmony BUSD (Harmony Bridged Asset) on Viper and finally bridges Harmony BUSD into ETH BUSD. (Development/Refactoring) - Beta Version: 09/27/2021
AWS Deployment (development) - Beta Version: 10/15/2021
Integration with Sushi (pending) - Beta Version: 10/30/2021
Integration with Kanga (pending) - Beta Version: TBD

Explore APIs

~~Share of Pool Metrics in Viper (Alpha) - Alpha Version: 10/08/2021~~
~~Gas costs (Alpha) - Alpha Version: 10/08/2021~~
APY (Development) - Alpha Version: 10/22/2021
Slippage (Development) - Alpha Version: 10/22/2021
Share of Pool Metrics (Beta) - Beta Version: 10/20/2021
Has Costs (Beta) - Beta Version: 10/20/2021

Meta transactions

General Contract Manager that can aggregate signature of multiple hashes for Bridging (Development) - Alpha Version: 01/11/2021

Multi-DEX

Automated Platform for the aggregation of multiple DEXs (Pending) - Alpha Version: 12/01/2021

Web Client

Web Client that implements API functionality - Alpha Version: 12/01/2021
Define Web client functionality - Version for open discussion and approval 10/15/2021
Enroll Collaborator to develop front-end

Development Updates

Week 10/03 - 10/10

Received feedback from beta-testers and suggested changes are being implemented
Development of UI testnet started
Simple mainnet transactions were successful
Containerization is complete

Week 10/18 - 10/25

Alpha for UI client is live

Debugging for API backend is complete
Deployed to AWS in test server