packages/react-hooks/src/useTreasury.ts
// Copyright 2017-2024 @polkadot/react-hooks authors & contributors
// SPDX-License-Identifier: Apache-2.0
import type { DeriveBalancesAccount, DeriveBounties, DeriveTreasuryProposals } from '@polkadot/api-derive/types';
import type { Balance } from '@polkadot/types/interfaces';
import { useEffect, useState } from 'react';
import { BN, BN_MILLION, BN_ZERO, u8aConcat } from '@polkadot/util';
import { createNamedHook } from './createNamedHook.js';
import { useApi } from './useApi.js';
import { useCall } from './useCall.js';
const EMPTY_U8A_32 = new Uint8Array(32);
interface Result {
value?: Balance;
burn?: BN;
pendingBounties: BN;
pendingProposals: BN;
spendPeriod: BN;
totalProposals?: number;
treasuryAccount: Uint8Array;
}
function useTreasuryImpl (): Result {
const { api } = useApi();
const [result, setResult] = useState<Result>(() => ({
pendingBounties: BN_ZERO,
pendingProposals: BN_ZERO,
spendPeriod: api.consts.treasury
? api.consts.treasury.spendPeriod
: BN_ZERO,
treasuryAccount: u8aConcat(
'modl',
api.consts.treasury && api.consts.treasury.palletId
? api.consts.treasury.palletId.toU8a(true)
: 'py/trsry',
EMPTY_U8A_32
).subarray(0, 32)
}));
const bounties = useCall<DeriveBounties>(api.derive.bounties?.bounties);
const treasuryProposals = useCall<DeriveTreasuryProposals>(api.derive.treasury.proposals);
const treasuryBalance = useCall<DeriveBalancesAccount>(api.derive.balances?.account, [result.treasuryAccount]);
useEffect((): void => {
treasuryBalance && api.consts.treasury &&
setResult(({ pendingBounties, pendingProposals, spendPeriod, treasuryAccount }) => ({
burn: treasuryBalance.freeBalance.gt(BN_ZERO) && !api.consts.treasury.burn.isZero()
? api.consts.treasury.burn.mul(treasuryBalance.freeBalance).div(BN_MILLION)
: BN_ZERO,
pendingBounties,
pendingProposals,
spendPeriod,
treasuryAccount,
value: treasuryBalance.freeBalance.gt(BN_ZERO)
? treasuryBalance.freeBalance
: undefined
}));
}, [api, treasuryBalance]);
useEffect((): void => {
treasuryProposals &&
setResult((prev) => ({
...prev,
pendingProposals: treasuryProposals.approvals.reduce((total, { proposal: { value } }) =>
total.iadd(value), new BN(0)
),
totalProposals: treasuryProposals.proposalCount.toNumber()
}));
}, [treasuryProposals]);
useEffect((): void => {
bounties &&
setResult((prev) => ({
...prev,
pendingBounties: bounties.reduce((total, { bounty: { status, value } }) =>
total.iadd(status.isApproved ? value : BN_ZERO), new BN(0)
)
}));
}, [bounties]);
return result;
}
export const useTreasury = createNamedHook('useTreasury', useTreasuryImpl);