PPSwap Channel

www.rumble.com/ppswap Episodes 78-81 1. Deploy WeenusToken, ZeenusToken and PPSwap Locally 2. Tesing the three contracts and their interactions locally 1. Easy to reset the state states 1) migrate --reset 2) exit the develop shell and reenter 2. Faster speed of testing Challenges: 1) asynchronous calls 2) big numbers Most tests should be repeatable in a test for the Mumbai testnet

www.rumble.com/ppswap 1. copy and past Weenus and Zeenus contracts 2. Deploy both Weenus and Zeenus on Dumbai 3. Add both contracts to Metamask Weenus:https://mumbai.polygonscan.com/address/0x922f3e9a47ba2ca85b3b9e3e2c4828c44da41a70 0x922F3E9a47ba2ca85b3B9E3E2c4828C44Da41a70 Zeenus: https://mumbai.polygonscan.com/address/0x53fa78da6aedd264288fe63383adb610e3804f86 0x53fa78DA6aEDd264288fE63383AdB610e3804F86 4. send 0 MATIC to the contracts to get some testing Weenus and Zeenus

- Revise PPSwap smart contract for Polygon - Deploy PPSwap locally for testing - eight unit tests for PPSwap contracts

1) Avoid high transaction fee on Ethereum 2) Avoid high bridge fee from Ethereum to Polygon

You sold an NFT on Polygon, but where is your WETH?

PPSwap on Polygon

No more configuring so many parameters...

No code change is necessary.

Ep72: An explanation of the code of the PPSwap contract

Ep 71： How to sell any ERC20 tokens for ETH using the PPSwap Launchpad

Ep 70: How to sell a new token using the PPSwap launchpad

Ep 69: A new draft of the PPSwap white paper

Ep 68: How to sell PPS during presale

Ep 67: How to buy PPS during presale

It is important to: 1) Give allowance (maybe a bit number or the balance of PPS for the seller) to the PPSwap contract; 2) Give allowance (maybe 1000 weth) to the PPSwap contract.

This experiment focused on the following tests: 1. Can one buy more than the maxbuy limit? 2. Can one buy more than the balance of tokenA? 3. After purchase, what is the new balance of tokenA for accounA and AccountB, respectively? 4. After purchase, what is the new balances of weth for accountA and accountB, are they correct? 95% sale income 5. After purchase, what is the new balance of weth for the trust account, is it correct? 5% sales tax

PPSwap is a token presale launchpad. One can sell Xeenus via PPSwap by 1) Make an offer on Xeenus and give allowance in the size of the balance of Xeenus to PPSwap 2) Give allowance in the size of the balance of Weth of the buyer to PPSwap 3) The seller accept the offer with the right amount of Weth.

Ep63: how to retrieve Free Weenus and Xeenus

Ep62: how to retrieve 1 free WETH?

The goal is changed: to support new token presale Simplifications to save gas: 1) No more reflections and rewards 2) No more change of price 3) swap fee does not depend on offerID