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Merge pull request #9051 from Agoric/9036-antefix-cosmos
fix: eliminate fee double-charge by using configurable decorator
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| import test from 'ava'; | ||
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| import { CHAINID, GOV1ADDR, GOV2ADDR, agd } from '@agoric/synthetic-chain'; | ||
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| test(`ante handler sends fee only to vbank/reserve`, async t => { | ||
| const [feeCollector, vbankReserve] = await Promise.all( | ||
| // Look up addresses for fee collector and reserve accounts. | ||
| ['fee_collector', 'vbank/reserve'].map(async name => { | ||
| const { | ||
| account: { | ||
| '@type': moduleAcct, | ||
| base_account: { address }, | ||
| }, | ||
| } = await agd.query('auth', 'module-account', name); | ||
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| t.is( | ||
| moduleAcct, | ||
| '/cosmos.auth.v1beta1.ModuleAccount', | ||
| `${name} is a module account`, | ||
| ); | ||
| return address; | ||
| }), | ||
| ); | ||
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| const getBalances = addresses => | ||
| Promise.all( | ||
| addresses.map(async address => { | ||
| const { balances } = await agd.query('bank', 'balances', address); | ||
| return balances; | ||
| }), | ||
| ); | ||
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| const [feeCollectorStartBalances, vbankReserveStartBalances] = | ||
| await getBalances([feeCollector, vbankReserve]); | ||
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| // Send a transaction with a known fee. | ||
| const feeAmount = 999n; | ||
| const feeDenom = 'uist'; | ||
| const result = await agd.tx( | ||
| `bank send ${GOV1ADDR} ${GOV2ADDR} 1234ubld --fees=${feeAmount}${feeDenom} \ | ||
| --from=${GOV1ADDR} --chain-id=${CHAINID} --keyring-backend=test --yes`, | ||
| ); | ||
| t.like(result, { code: 0 }); | ||
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| const [feeCollectorEndBalances, vbankReserveEndBalances] = await getBalances([ | ||
| feeCollector, | ||
| vbankReserve, | ||
| ]); | ||
| t.deepEqual(feeCollectorEndBalances, feeCollectorStartBalances); | ||
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| // The reserve balances should have increased by exactly the fee (possibly | ||
| // from zero, in which case start balances wouldn't include its denomination). | ||
| const feeDenomIndex = vbankReserveStartBalances.findIndex( | ||
| ({ denom }) => denom === feeDenom, | ||
| ); | ||
| const preFeeAmount = | ||
| feeDenomIndex < 0 | ||
| ? 0n | ||
| : BigInt(vbankReserveStartBalances[feeDenomIndex].amount); | ||
| const beforeCount = | ||
| feeDenomIndex < 0 ? vbankReserveStartBalances.length : feeDenomIndex; | ||
|
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| const vbankReserveExpectedBalances = [ | ||
| ...vbankReserveStartBalances.slice(0, beforeCount), | ||
| { amount: String(preFeeAmount + feeAmount), denom: feeDenom }, | ||
| ...vbankReserveStartBalances.slice(beforeCount + 1), | ||
| ]; | ||
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| t.deepEqual( | ||
| vbankReserveEndBalances, | ||
| vbankReserveExpectedBalances, | ||
| 'vbank/reserve should receive the fee', | ||
| ); | ||
| }); |
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