Chris Maree

HoneyLemon is creating synthetic Bitcoin cloud mining contracts on top of Ethereum. This enables BTC miners to sell the future payoff from their hash rate which acts as a hedge against volatility in the BTC mining industry. Investors can buy future payoff from cloud mining contracts to gain exposure to the synthetic payoff which. This enables them to get exposure to mining without needing to invest in mining equipment.

I am a core contributor and am currently responsible for the smart contracts implementation. I am also involved the financial engineering and overall system design.

Cherry Swap is building next generation financial derivatives which leverage the existing DeFi ecosystem to offer pooled interest rate swaps for borrowers and lenders. Through interest rate swaps DeFi users can either secure a fixed rate to borrow or lend against or speculate on changing interest rates in the DeFi lending market. Cherry Swap implements a custom version of a traditional vanilla interest rate swap; hence the name interest rate swaps with a cherry on top.

I am one of the co-founders of this project and am currently responsible for building out the financial models to build interest rate swaps within the DeFi space. Cherry Swap won EthBerlin open track prize and has received the Binance X Fellowship.

NFT eCards for greater fun and greater good. All income goes to charities working to promote Internet freedom and environmental rights. Under the hood RadiCards is a platform for creating NFT eCards. Ether or DAI can be attached to the eCards and then sent to friends using trustless claimable links. All other proceeds go to charity.

I was one of the founders of the project and helped build out the initial version for Christmas in 2018. Early 2019 we took the project to a new level integrating claimable links and DAI intergration for Chinese New Year 2019. I lead up the development for this second iteration and was responsible for the smart contracts and front end design and integration.

MeterBlock was a collaborative project that created a decentralised platform to facilitate the governance of electrical energy consumption and production, measured and controlled by smart, blockchain-connected power meters. The goal of the project was to build a prototype device running on the Ethereum blockchain to facilitate this energy exchange governance.

This project formed part of my dissertation for my honors degree. It won the SAIEE National Student Paper Competition as well as the most innovative 4th year project amongst all engineering discipline in my graduate class at Wits in 2018.

Portfolio Alignment for Degens. With Mindful, you can adopt strategies to mindfully DCA into assets, rebalance your portfolio, and take profits automatically. Let your mindful self plan for your degen self’s future. Mindful was built as part of the EthOnline 2020 hackathon where we placed as a finalist and won the Balancer first prize award.

UpsideDai is a highly leveraged contract for difference (CFD) built on Dai, Uniswap and Maker. This mechanism enables traders and speculators to bet on and hedge against price fluctuations of Dai by buying leveraged long or short positions. The CFD construction enables high leverage (20x) while remaining capital efficient and not requiring high margin requirements (100% collateralization). Positions are priced against the market observable Dai/Usd price by using a combination of the Maker oracle and Uniswap.

DAI Daddy II builds on enabling the unwinding CDPs. Under this model, rather than requiring a counterparty to ensure a CDP is repaid, the new DAI Daddy smart contract withdraws collateral from the CDP, uses Kyber Network to convert this ETH to DAI, and then pays off the CDP and returns the remaining ETH collateral to the owner.

Dai Daddy is an autonomous platform for buying and selling Maker CDPs. Sellers can list their CDP for sale and offer a “discount rate” - less than the 13% fee they would have to pay if forcibly liquidated - which incentivises buyers to provide capital upfront and buy out the seller’s debt. In this way it acts like a debt market for makerCDPs.

Dapp to sell crypto at predefined intervals on the way up during a bull run. Dapp calculates all sell prices based on user input and recommends the best strategy to exit your position. Funds are stored in smart contracts and automatically traded via Uniswap. Contracts were written in Vyper, front end in VueJS using materialUI. Offchain relayers watch the contracts and trustlessly execute trade orders within the contract to preform token swaps on UniSwap.

Dapp created as past of masters degree enabling academics to monetize their research for commercial applications while supporting open science. Researches can register on the platform, upload their works and create open auctions for material. Companies can buy licenses to use the research which mints non-fungible tokens(ERC721) which represent ownership of a licence. Integration done with IPFS for file storage and Orcid for academic profile verification.

Cryptocurrency backtest to compare different rebalancing and trading strategies. It covers working with crypto price API’s to retrieve information, manipulate this information using pandas and numpy into something that can be used in time series computations to implement different trading strategies. Interactive time series plotting is covered using plotly.

Dapp which creates automatically rebalancing crypto funds in a decentralized and trustless manor. Snap fund leverages decentralized exchanges for automated portfolio rebalancing to maintain a predefined ratio of ERC20 tokens.

Contributed to the development of the Blockchain Art Directory (BAD) that serves as a service featuring a comprehensive collection of current, future and former projects which are dedicated to blockchain art, crypto collectibles and Non Fungible Tokens. I was responsible for building the search and filtering component of the front end application as a freelancer.

Energy consumption visulization to monitor and optimize energy consumption for a dynamic collection of buildings, such as a university. This a component of my honors thesis at Wits along with meterBlock.

Decentralized, peer to peer funding platform for creatives, charities and open source projects. Ethstarter enables individuals to create new campaigns and publish them on an open platform. Key campaign logic is stored within Ethereum Smart contracts and additional information (such as images, text and embedded content) is stored on IPFS.

I wrote a paper on the current research into Ethereum smart contract development best practice relating to contract security. Previously hacked contracts are identified and discussed, breaking down exactly how the hack occured. A selection of the latest symbolic execution-based and static analysis tools are then used to analyze these contracts to try and identify the exploited vulnerabilities.

blockPoll is a pseudo-anonymous, online, blockchain-based voting tool, used to facilitate organizational-based proxy voting and polling mechanisms for a wide array of uses.

Co-owned multisignature staking pool for Ethereum’s proof of stake. Was conceptual before ETH2.0 specks were full defined or fleshed out and explored the possibility of staking pools.

Started an open-source project providing cryptographically verifiable certificates of authenticity, stored on Ethereum (eg university degrees, on the Blockchain). Was my first intro into Ethereum blockchain, more serious front end development and smart contracts.