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28 lines
1.8 KiB
Go
28 lines
1.8 KiB
Go
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/*
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Package CDP manages the storage of Collateralized Debt Positions. It handles their creation, modification, and stores the global state of all CDPs.
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Notes
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- sdk.Int is used for all the number types to maintain compatibility with internal type of sdk.Coin - saves type conversion when doing maths.
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Also it allows for changes to a CDP to be expressed as a +ve or -ve number.
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- Only allowing one CDP per account-collateralDenom pair for now to keep things simple.
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- Genesis forces the global debt to start at zero, ie no stable coins in existence. This could be changed.
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- The cdp module fulfills the bank keeper interface and keeps track of the liquidator module's coins. This won't be needed with module accounts.
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- GetCDPs does not return an iterator, but instead reads out (potentially) all CDPs from the store. This isn't a huge performance concern as it is never used during a block, only for querying.
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An iterator could be created, following the queue style construct in gov and auction, where CDP IDs are stored under ordered keys.
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These keys could be a collateral-denom:collateral-ratio so that it is efficient to obtain the undercollateralized CDP for a given price and liquidation ratio.
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However creating a byte sortable representation of a collateral ratio wasn't very easy so the simpler approach was chosen.
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TODO
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- A shorter name for an under-collateralized CDP would shorten a lot of function names
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- remove fake bank keeper and setup a proper liquidator module account
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- what happens if a collateral type is removed from the list of allowed ones?
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- Should the values used to generate a key for a stored struct be in the struct?
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- Add constants for the module and route names
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- Many more TODOs in the code
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- add more aggressive test cases
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- tags
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- custom error types, codespace
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*/
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package cdp
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