Introduction
Given the opportunity to review the YFETH smart contract source code, we in the report outline our systematic approach to evaluating potential security issues in smart contract implementation, uncover possible semantic inconsistencies between smart contract code and design documents, and provide additional suggestions or recommendations for improvement. Our results suggest that certain YFETH branches could be further upgraded due to some security or performance related issues. This document outlines the results of our audit.
What is Yfswap?
Yfswap is an AMM based Dex created with the aim of providing a one stop solution, farming DeFi, Staking, and Dex Exchange all in one. YFBTC and YFETH will use the LP pool from Uniswap until the LP pool grows large enough. Migration will be selected by the user if the user wants the full benefit of getting exchange fees at YFSwap. Uniswap shares swap fees with its own core investors, while YFSwap users can get the full amount of swap fees. Even more than Sushiswap.
YFBTC & YFETH are non-inflation cryptocurrencies that follow the same principles from their legacy by being completely decentralized. YFETH is the original from YFSwap for the AMM Pool prize.
As the food meme DeFi token is slowly showing that it is unsustainable with borderless agriculture, YFBTC and YFETH are solutions for users to confidently endure for the long term. Provides an alternative to ETH and BTC users to hold non-inflationary cryptocurrencies while farming.
Methodology
To standardize the evaluation, we define the following terminology based on the OWASP Risk Rating Methodology:
Kemungkinan menunjukkan seberapa besar kemungkinan kerentanan tertentu akan terungkap dan dieksploitasi di alam liar;
Dampak mengukur kerugian teknis dan kerusakan bisnis dari serangan yang berhasil;
Tingkat keparahan menunjukkan kekritisan risiko secara keseluruhan.
YFBTC FREE FOR CLAIM INSTRUCTIONS ON YFBTC.NET
The YFBTC Free Claim Amount is 1,000. YFBTC will end airdrops and tokens can be claimed on 18 October 2020 with each user claiming 0.1 YFBTC, and is now listed on the Uniswap decentralized exchange. Additional potential exchanges to list are Hotbit and Bilaxy.
USERS WHO WANT TO BUY YFBTC VIA UNISWAP
To kick-start the Uniswap trading process, 1% of 21,000 YFBTC (210 YFBTC) will be sold at Uniswap in 3 phases, and 950 YFBTC is for initial private contributors who help fund the start-up phase for YFSwap. Before purchasing, please confirm that it is the correct YFBTC Contract address.
YFBTC (21,000 Total Supply)
The UNISWAP address of DeFi Bitcoin YFBTC DeFi Yield farming will be on YFBTC.net
TOTAL DISTRIBUTION YFBTC
YFBTC will be distributed with the spirit of YFI, only 5.5% Pre- mine, without Founder's shares, without VC interest. equal odds betting distribution to attract a wide community and align with the vision to manage the future of protocols and tokens. The total number of YFBTC is 21,000.
YFETH (75,000 Total Supply)
WE DO NOT ENCOURAGE YFETH PURCHASES. BUT BETTER THAN RUG PULLS OR FOOD DEFI. But if you still want to continue, click participate in the Campaign.
Crowdfunding & FREE CLAIM YFETH INSTRUCTIONS
To be eligible for airdrop, your metamask wallet must be ONE of "300 UNI, 300 BITTO, 0.5 YFI, 300 BAL, 300 LINK, 300 BNB, 300 HT, 300 OKB, 300 BAND, 300 NXM". YOU are entitled to 3 YFETH FREE tokens.
Use your Metamask wallet to send ETH to the crowdfunding address, DO NOT SEND FROM EXCHANGE.
YFETH will be automatically sent to your source address according to your ETH source address via smart contract.
Some ETH can be transferred, automatically collected
YFETH's initial amount was 75,000, and YFETH Free's airdrop was 39,125. Another 35,875 YFETH will be allocated for crowdfunding to help maintain servers and project sustainability and future development. But YFETH left over from crowdfunding will be burned and will NOT be kept by the team or developer to ensure maximum decentralization of the YFETH supply.
YFETH will end the airdrop and tokens must be claimed before 16 October 2020. YFETH will also be listed on the Uniswap decentralized exchange. Additional potential exchanges to list are Hotbit and Bilaxy.
CROWDFUNDING RULES
The total number of crowdfunding phase one is 8,500 YFETH, and crowdfunding time: From Phase 1 from 7 Oct 2020 (UTC + 8) to ending on 16 Oct 2020 (UTC + 8) or until 550th ETH is received.
Crowdfunding price of 1 ETH = 100 YFETH
The end of the first round of crowdfunding is subject to the 85th ETH received by the crowdfunding address.
The total amount of the second phase crowdfunding is 12,375 YFETH, and the crowdfunding time: 250th ETH received by the crowdfunding address until 11 Oct 2020 (UTC + 8)
Crowdfunding price of 1 ETH = 75 YFETH
The total amount of the second phase crowdfunding is 12,375 YFETH, subject to the 250th ETH received by the crowdfunding address.
Crowdfunding price of 1 ETH = 50 YFETH
The total crowdfunding amount for the third phase is 15,000 YFETH, subject to the 550th ETH received by the crowdfunding address or until 16 Oct 2020 (UTC + 8) whichever comes first.
Quotas are sorted by time, and tokens are issued, the faster the participation, the greater the success rate. If the crowdfunding is complete, you will receive YFETH. Purchases will be returned automatically if the purchase is not successful. 1 address can only buy up to 25 ETH to avoid monopoly and ensure decentralization of YFETH assets.
TOTAL YFETH DISTRIBUTION
YFETH's initial amount was 75,000, and YFETH Free's airdrop was 39,125. Another 35,875 YFETH will be allocated for crowdfunding to help maintain servers and project sustainability and future development. If any YFETH remains from crowdfunding or airdropping, it will be burned and will NOT be kept by the team or developer to ensure maximum decentralization of the YFETH supply. YFETH follows Constantinople ETH enhancement protocol.
We reserve the right to cancel airdrops to users who we think are abusing the system. We hope to provide this opportunity to other users.
This airdrop allows machine learning to identify fraud. Those identified as scammers will cancel the airdrop, and those who participate in the recognition will return ETH.
Conclusion
In this audit, we thoroughly analyzed the design and implementation of YFETH. Overall, YFETH presents an evolutionary upgrade based on Uniswap and provides additional incentives to liquidity providers. Our impression is that the current codebase is well organized. In the meantime, we need to emphasize that the smart contract as a whole is still in its infancy, but exciting development. To improve this report, we would appreciate any constructive feedback or suggestions regarding our methodology, audit findings, or potential gaps in scope.
For more information see the link below:
Website: https://www.yfswap.finance/index.html
Media: https://yfswapfi.medium.com/
Telegram: https://t.me/yfswap
Github: https://github.com/abanshinoburu
Name:Bayanganhitam
https://bitcointalk.org/index.php?action=profile;u=2851798;sa=summary
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