fix: swap quote slippage

[therealemjy]

Changes

• fix an issue where the slippage would be incorrectly applied to swap quotes coming from the API

[changeset-bot]

🦋 Changeset detected

Latest commit: b62eeca

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@venusprotocol/evm	Minor

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Project	Deployment	Actions	Updated (UTC)
dapp-preview	Ready	Preview	May 21, 2026 2:58pm
dapp-testnet	Ready	Preview	May 21, 2026 2:58pm
venus.io	Ready	Preview	May 21, 2026 2:58pm

[greptile-apps]

Greptile Summary

This PR fixes a bug where slippagePercentage was being divided by 100 twice before being passed to formatSwapQuote: once when building the API request params (slippagePercentage / 100) and again when reading it back via Number(params.slippagePercentage). The fix replaces the read-back with the original slippagePercentage variable, so the correct percentage (e.g. 0.5) is used when computing minimum/maximum token amounts.

• getSwapQuote/index.ts: One-line fix — slippagePercentage is now passed directly to formatSwapQuote instead of the already-divided params.slippagePercentage.
• Test snapshots: Updated to reflect the correct 0.5% slippage values (995000000000000000n / 1005000n) replacing the erroneous 0.005% values.

Confidence Score: 5/5

Safe to merge — the fix is a straightforward one-line correction with updated tests that verify the correct slippage math.

The root cause is clear and well-understood: params.slippagePercentage was already slippagePercentage / 100, so reading it back via Number(params.slippagePercentage) applied the division twice. Using the original variable directly resolves this. The updated snapshots confirm the expected output now matches 0.5% slippage instead of 0.005%.

No files require special attention beyond the minor changeset versioning note.

Important Files Changed

Filename	Overview
apps/evm/src/clients/api/queries/getSwapQuote/index.ts	Fixes slippage being divided by 100 twice: replaces Number(params.slippagePercentage) (which was already slippagePercentage / 100) with the original slippagePercentage variable. Correct fix.
apps/evm/src/clients/api/queries/getSwapQuote/__ tests__/index.spec.ts	Updates expected snapshot values to reflect the corrected 0.5% slippage (995000000000000000n / 1005000n) instead of the erroneous 0.005% slippage from before the fix. Math checks out.
.changeset/rotten-ways-love.md	Changeset version type is minor for a pure bug fix; should be patch per semver convention.

_{Reviews (2): Last reviewed commit: "fix: fix an issue with swap quote slippa..." | Re-trigger Greptile}

[therealemjy]

@greptile

[github-actions]

Coverage Report for ./apps/evm

Status	Category	Percentage	Covered / Total
🔵	Lines	81.18%	45343 / 55854
🔵	Statements	81.18%	45343 / 55854
🔵	Functions	62.36%	648 / 1039
🔵	Branches	72.3%	5106 / 7062

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
apps/evm/src/clients/api/queries/getSwapQuote/index.ts	98.59%	92.85%	100%	98.59%	1

Generated in workflow #13503 for commit 14a95bd by the Vitest Coverage Report Action