Lossless Betting - contracts

The Contracts

The repo contain 3 main contracts

Lossless.sol

This contract implement is a boilerplate for lossless betting contracts for football 1X2. Contract has an owner to settle the bet, to be replaced by Chainlink.

Process

1. Owner creates contract, sets matchStartBlock and matchFinishBlock : Players can place bets before matchStartBlock and owner can settle the game after `matchFinishBlock.
2. Before matchStartBlock player can pick a side ( Home, Draw, Away), choose an amount and place a bet.
3. After placing a bet the player win points proportional to the amount and blocks remaining before matchStartBlock.
4. The chance of winning for the player is proportional to his points.
5. The money deposited for bets is then lent to a protocol and earns yield : Lending logic should be implemented in the contract that inherits this one.
6. After game is finished and owner sets winning team, contract pick randomly a winner who bet on the right side.
7. Winner wins the yield generated, and other players are refunded.

Params

1. matchStartBlock : Block at which game is supposed to start.
2. matchFinishBlock : Block after which game should have ended.

AaveLossless.sol

This contract implement is a lossless betting contracts for football 1X2 that use Aave to generate yield. Contract has an owner to settle the bet, to be replaced by Chainlink

Process

1. Contract inherits from Lossless.sol.
2. Owner creates contract, sets token and lendingpool : token for betting and lending pool to use..
3. Contract can also be sponsored : someone deposit without participating in betting.
4. Players can place bets before matchStartBlock.
5. Betting money is then deposited into Aave to earn yield.
6. Owner can settle the game after matchFinishBlock, a winner is then randomly picked he wins the yield generated.

Anyone can

1. Sponsor the contract.
2. Place bets before matchStartBlock .

Admin/Owner can

1. Set winning team after matchFinishBlock.

Params 2. token : ERC20 token address used for betting. 3. lendingPool : Aave lending pool address. 4. winner :Winning player address. 5. sponsorDeposit : Amount deposited by sponsors to the contract.

BenqiLossless.sol

Similar to AaveLossless.sol, not implemented yet

Tests

All tests/scripts are written with brownie.

Local testing using mainnet-fork. No unit test yet, deployed contract on mainnet-fork and tested theAaveLossless.sol process with a script end to end using the weth token. Worked fine.

Compononets used

1. Node JS (everything was tested under v14.18.1)
2. Brownie - ( the version used is v1.17.2)
3. Ganache CLI ( the version used is v6.12.2 )

Remark

Contracts are written in solidity v0.6.xand SafeMath have not been implemented yet.