The WANT Token Exchange Pool was conceived as a whimsical approach to DeFi.
A "gashapon" (https://en.wikipedia.org/wiki/Gashapon) is a type of coin operated vending machine that is popular in Japan. It dispenses a random toy or collectible in a capsule when used.
What if you had a gashapon style decentralized token pool that allowed you to receive random ERC20 tokens?
We implemented a pool for items that give you tokens based on the scarcity of item. In that way it works like a self-balancing stable coin. Participants are incentivized to add tokens with lower representation in the overall pool.
Users are rewarded when they redeem a WANT token in a way that is fair and fun!
There is a smart contract suite built in Solidity that uses Open Zeppelin libraries and relies on Uniswap for token exchanges.
The demo contract is deployed on Rinkeby at address: 0x42F3e1c5C32819255a18F22bB6eF342f8C73Ba37
We currently have four tokens to put into our pool:
The contract main functions:
claim: we claims random tokens from pool by burning WANT tokens [amount] times
deposit: we add a supported token to the pool.
getPayout: return the expected WANT tokens we can have by putting some amount of tokens to the pool.
getTokenDecimals: get decimals of an erc20 token.
ownedTokenAmount: get the amount of an erc20 token we have in the pool.
Contract Events: we have Claim and Deposit, more information can be found in contracts/WANT.sol.
The front end is built in Vue.js and has:
A form to select a list of supported tokens and the ability to input the amount of tokens to put into the pool
A button to redeem a single WANT token
After a transaction, we update the display of token balances