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Elixir interfaces to Kujira dApps, for building indexers, APIs and bots
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lib/kujira/bow/leverage/position.ex
defmodule Kujira.Bow.Leverage.Position do
@moduledoc """
An item representing the collateral deposit vs debt position of a particular address for a particular market
## Fields
* `:idx` - Position ID
* `:bow` - The BOW pool for this position
* `:leverage` - The leverage contract that manages this position
.
* `:holder` - The address that owns the position
* `:debt_shares_base` - The amount of the base debt token borrowed by this position
* `:debt_amount_base` - The resultant amount of debt owed, based on the `debt_ratio`
* `:debt_shares_quote` - The amount of the quote debt token borrowed by this position
* `:debt_amount_quote` - The resultant amount of debt owed, quoted on the `debt_ratio`
* `:lp_amount` - The total LP token collateral owned by the position
* `:collateral_amount_base` - The base amount that the current LP token is worth
* `:collateral_amount_quote` - The quote amount that the current LP token is worth
"""
alias Kujira.Bow.Pool.Stable
alias Kujira.Bow.Pool.Xyk
alias Kujira.Bow.Leverage
alias Kujira.Ghost.Vault
alias Kujira.Bow.Status
defstruct [
:idx,
:bow,
:leverage,
:holder,
:debt_shares_base,
:debt_amount_base,
:debt_shares_quote,
:debt_amount_quote,
:lp_amount,
:collateral_amount_base,
:collateral_amount_quote
]
@type t :: %__MODULE__{
idx: String.t(),
bow: {Xyk | Stable, String.t()},
leverage: {Leverage, String.t()},
holder: String.t(),
debt_shares_base: integer(),
debt_amount_base: integer(),
debt_shares_quote: integer(),
debt_amount_quote: integer(),
lp_amount: integer(),
collateral_amount_base: integer(),
collateral_amount_quote: integer()
}
@spec from_query(Leverage.t(), Vault.t(), Vault.t(), Xyk.t() | Stable.t(), map()) ::
:error | {:ok, __MODULE__.t()}
def from_query(
%Leverage{address: address},
%Vault{status: %Vault.Status{debt_ratio: debt_ratio_base}},
%Vault{status: %Vault.Status{debt_ratio: debt_ratio_quote}},
%struct{address: bow, status: %Status{} = status},
%{
"idx" => idx,
"holder" => holder,
"debt_shares" => [debt_shares_base, debt_shares_quote],
"lp_amount" => lp_amount
}
) do
with {lp_amount, ""} <- Integer.parse(lp_amount),
{debt_shares_base, ""} <- Integer.parse(debt_shares_base),
{debt_shares_quote, ""} <- Integer.parse(debt_shares_quote) do
debt_amount_base =
debt_shares_base
|> Decimal.new()
|> Decimal.mult(debt_ratio_base)
|> Decimal.round(0, :ceiling)
|> Decimal.to_integer()
debt_amount_quote =
debt_shares_quote
|> Decimal.new()
|> Decimal.mult(debt_ratio_quote)
|> Decimal.round(0, :ceiling)
|> Decimal.to_integer()
collateral_amount_base =
Decimal.div(lp_amount, status.lp_amount)
|> Decimal.mult(status.base_amount)
collateral_amount_quote =
Decimal.div(lp_amount, status.lp_amount)
|> Decimal.mult(status.quote_amount)
{:ok,
%__MODULE__{
idx: idx,
bow: {struct, bow},
leverage: {Leverage, address},
holder: holder,
lp_amount: lp_amount,
debt_shares_base: debt_shares_base,
debt_amount_base: debt_amount_base,
debt_shares_quote: debt_shares_quote,
debt_amount_quote: debt_amount_quote,
collateral_amount_base: collateral_amount_base,
collateral_amount_quote: collateral_amount_quote
}}
end
end
def from_query(%Leverage{}, %Vault{}, %Vault{}, %Xyk{}, _), do: :error
def from_query(%Leverage{}, %Vault{}, %Vault{}, %Stable{}, _), do: :error
@doc """
Returns the liquidation price of the position
"""
@spec liquidation_price(
Bow.Leverage.t(),
__MODULE__.t()
) :: Decimal.t()
def liquidation_price(%Leverage{max_ltv: max_ltv}, %__MODULE__{
debt_amount_base: debt_amount_base,
debt_amount_quote: debt_amount_quote,
collateral_amount_base: collateral_amount_base,
collateral_amount_quote: collateral_amount_quote
}) do
d = max_ltv |> Decimal.mult(collateral_amount_base) |> Decimal.sub(debt_amount_base)
debt_amount_quote
|> Decimal.sub(Decimal.mult(max_ltv, collateral_amount_quote))
|> Decimal.div(d)
end
end