Contracts overview

Contract architecture
( Updated 2021/ 3 / 1 )
Diagram is based on live deployed
Belt.fi have two contract group ( Vaults and AMM with Yield )
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Contract list
BELT Token
Code
​https://github.com/BeltFi/belt-contract/blob/main/contracts/bsc/BeltToken.sol​
Description
BEP-20 BELT token contract
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MasterBelt
Code
​https://github.com/BeltFi/belt-contract/blob/main/contracts/bsc/earn/MasterBelt.sol​
Description
Mint BELT token
Manages pools and Distribute BELT token to pools according to their points allocated
Calculating pendingBELT for claim
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BeltStrategies
Code
​https://github.com/BeltFi/belt-contract/tree/main/contracts/bsc/earnV2/strategies​
​https://github.com/BeltFi/belt-contract/tree/main/contracts/bsc/earnV2/strategiesV2​
Description
All of the strategy codes that BELT finance is running to earn interests for the assets deposited
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BeltSingleStrategyToken
Code
​https://github.com/BeltFi/belt-contract/blob/main/contracts/bsc/earnV2/tokens/SingleStrategyTokenImpl.sol​
​https://github.com/BeltFi/belt-contract/blob/main/contracts/bsc/earnV2/tokens/SingleStrategyTokenImpl2.sol​
Description
A SingleStrategyToken that uses one of the BeltStrategies
A user will receive shares by depositing assets to the SingleStrategyToken contract.
The shares returned will be proportional to the amount the user deposited
A user will receive original assets by turning in shares to the SingleStrategyToken contract
 The assets returned will be proportional to the shares returned 
The difference between SingleStrategyToken, SingleStrategyToken2:
the first one has some interval in moving assets to the strategy(before that the assets remains in the SingleStrategyToken contract), whereas the second one instantly moves every assets to the strategy. 
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BeltMultiStrategyToken
Code
​https://github.com/BeltFi/belt-contract/blob/main/contracts/bsc/earnV2/tokens/MultiStrategyTokenImpl.sol​
Description
A MultiStrategyToken contract has multiple strategies
Every one of MultiStrategyToken's strategy is a SingleStrategyToken contract.
A user will receive shares by depositing assets to the MultiStrategyToken contract.
The shares returned will be proportional to the amount the user deposited
A user will receive original assets by turning in shares to the MultiStrategyToken contract
 The assets returned will be proportional to the shares returned
Each strategy used in the MultiStrategyToken has a ratio value assigned to it and there are ideal balances for each strategy calculated based on its ratio value assigned
When a user deposits, the assets are moved to a strategy most off from its ideal balance but only accounts strategies whose balances are smaller than its ideal balance (a.k.a most insufficient strategy)
When a user withdraws(turns in shares), the assets are withdrawn from
1. a strategy most off from its ideal balance and whose balances are greater than its ideal balance (a.k.a most sufficient strategy)
2. if the strategy from step 1. did not suffice then a strategy that has the most balance irrelevant from its ratio (a.k.a most locked strategy)
3. if the strategy from step 2. did not suffice, the transaction fails.
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BeltLPTokenv2
Code
​https://github.com/BeltFi/belt-contract/blob/main/contracts/bsc/swapV2/BeltLPTokenv2.vy​
Description
The LP token of 4belt stable swap
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StableSwapBv2
Code
​https://github.com/BeltFi/belt-contract/blob/main/contracts/bsc/swapV2/StableSwapBv2.vy​
Description
A stable swap between pool member tokens
Each member in the stable swap is a USD pegged multi strategy token  
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DepositBv2
Code
​https://github.com/BeltFi/belt-contract/blob/main/contracts/bsc/swapV2/DepositBv2.vy​
Description
Depositor for the 4belt stable swap
Takes in USD pegged assets and returns a 4belt LP token to the user
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VaultBPool
BeltLPToken vaults 
Code
​https://github.com/BeltFi/belt-contract/blob/main/contracts/bsc/earn/strategies/VaultBPool.sol​
Description
Vaults of BeltLPToken
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CakeLPToken vaults
Code
​https://github.com/BeltFi/belt-contract/blob/main/contracts/bsc/earn/strategies/VaultCakePool.sol​
Description
Vaults of CakeLPToken
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Contract architecture

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