111 lines
2.8 KiB
TypeScript
111 lines
2.8 KiB
TypeScript
import { Bank, Group, MangoAccount } from '@blockworks-foundation/mango-v4'
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import Decimal from 'decimal.js'
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import { useMemo } from 'react'
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import mangoStore from '@store/mangoStore'
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import { floorToDecimal } from '../../utils/numbers'
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import useMangoAccount from '../../hooks/useMangoAccount'
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import useMangoGroup from 'hooks/useMangoGroup'
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export const getMaxWithdrawForBank = (
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group: Group,
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bank: Bank,
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mangoAccount: MangoAccount,
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allowBorrow = false
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): Decimal => {
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const accountBalance = mangoAccount.getTokenBalanceUi(bank)
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const vaultBalance = group.getTokenVaultBalanceByMintUi(bank.mint)
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const maxBorrow = mangoAccount.getMaxWithdrawWithBorrowForTokenUi(
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group,
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bank.mint
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)
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const maxWithdraw = allowBorrow
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? Decimal.min(vaultBalance, maxBorrow)
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: Decimal.min(accountBalance, vaultBalance, maxBorrow)
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return Decimal.max(0, maxWithdraw)
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}
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export const getTokenInMax = (
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mangoAccount: MangoAccount,
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inputTokenAddress: string,
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group: Group,
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useMargin: boolean
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) => {
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const outputBank = mangoStore.getState().swap.outputBank
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const inputBank = group.banksMapByMint.get(inputTokenAddress)?.[0]
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if (!group || !inputBank || !mangoAccount || !outputBank) {
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return {
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amount: new Decimal(0.0),
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decimals: 6,
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amountWithBorrow: new Decimal(0.0),
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}
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}
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const inputTokenBalance = floorToDecimal(
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mangoAccount.getTokenBalanceUi(inputBank),
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inputBank.mintDecimals
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)
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const maxAmountWithoutMargin = inputTokenBalance.gt(0)
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? inputTokenBalance
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: new Decimal(0)
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const maxUiAmountWithBorrow = floorToDecimal(
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mangoAccount.getMaxSourceUiForTokenSwap(
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group,
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inputBank.mint,
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outputBank.mint,
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1
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),
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inputBank.mintDecimals
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)
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const inputBankVaultBalance = floorToDecimal(
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group.getTokenVaultBalanceByMintUi(inputBank.mint),
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inputBank.mintDecimals
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)
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const maxAmount = useMargin
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? Decimal.min(
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maxAmountWithoutMargin,
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inputBankVaultBalance,
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maxUiAmountWithBorrow
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)
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: Decimal.min(maxAmountWithoutMargin, inputBankVaultBalance)
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const maxAmountWithBorrow = Decimal.min(
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maxUiAmountWithBorrow,
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inputBankVaultBalance
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)
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return {
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amount: maxAmount,
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amountWithBorrow: maxAmountWithBorrow,
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decimals: inputBank.mintDecimals,
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}
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}
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export const useTokenMax = (useMargin = true) => {
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const { mangoAccount } = useMangoAccount()
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const { group } = useMangoGroup()
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const inputBank = mangoStore((s) => s.swap.inputBank)
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const tokenInMax = useMemo(() => {
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if (mangoAccount && group && inputBank) {
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return getTokenInMax(
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mangoAccount,
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inputBank?.mint.toString(),
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group,
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useMargin
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)
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}
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return {
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amount: new Decimal(0),
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amountWithBorrow: new Decimal(0),
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decimals: 6,
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}
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}, [mangoAccount, group, useMargin, inputBank])
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return tokenInMax
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}
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