Liquidity-depth & slippage estimation endpoint

[Miracle656]

Background

Bots need more than a spot price — they need to know how much a given trade size will move the price. A depth/slippage endpoint answers "what price for size X?".

What to build

From order-book / AMM pool data, expose an endpoint that returns expected execution price and slippage for a requested trade size, plus available depth at price levels.

Key files

• src/pricing/depth.ts (new)
• src/api/rest.ts

Acceptance criteria

• Returns execution price + slippage for a given size
• Depth levels reflect real pool/book state
• Unit tests for slippage math against known curves

Drips Wave · Complexity: Advanced · 200 points

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[supremeproton02]

@supremeproton02 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi maintainer, can i be assigned to this?

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[K1NGD4VID]

@K1NGD4VID has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello maintainer, i would like to work on this issue

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[tecch-wiz]

@tecch-wiz has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi, I’m interested in working on this issue. I have experience with web and blockchain development, and I’d love to contribute to the project. Please assign this issue to me if it’s available. Thanks!

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[drips-wave]

Congratulations, @supremeproton02! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @supremeproton02: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

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[drips-wave]

This issue has been marked as completed by a Drips Wave moderator for @supremeproton02 as part of the Stellar Wave Program's 6th Wave 🥳

Moderator's reason: [Auto-assessed] The PR was approved and merged by the maintainer, who explicitly stated that it closes the issue. The contributor implemented the requested endpoint, including AMM-based depth and slippage calculations and unit tests.

😎 @supremeproton02: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here.

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ℹ️ Note: This issue was marked complete via moderation. Points were issued even though the GitHub issue remains open.