Crypto limit orders — gasless, non-custodial

SKILL.md

---
name: crypto-limit-order
description: Crypto limit orders. Gasless, oracle-protected execution across 8 EVM chains. 
---

# Spot Advanced Swap Orders

Place crypto limit orders on any supported DEX — gasless, non-custodial, and oracle-protected across 8 EVM chains.
Use this skill when the agent needs to turn user intent into a final Spot order payload on a supported EVM chain.
It covers order-shape selection, param normalization, typed-data population, approval guidance, signing, submission, query, and cancellation.
This bundle is instruction-only: build everything locally from the bundled markdown and JSON assets, then submit only the final signed payload.
Execution remains decentralized, non-custodial, oracle-protected, immutable, audited, and battle-tested onchain.

## Supported Chains

1. Ethereum - `1` - adapter `0xC1bB4d5071Fe7109ae2D67AE05826A3fe9116cfc`
2. BNB Chain - `56` - adapter `0x67Feba015c968c76cCB2EEabf197b4578640BE2C`
3. Polygon - `137` - adapter `0x75A3d70Fa6d054d31C896b9Cf8AB06b1c1B829B8`
4. Sonic - `146` - adapter `0xD87ee28806bc0060789C4789F123647f4Df25A6C`
5. Base - `8453` - adapter `0xc64d6E64A713EfbbCcB14413479c56461F9c0b77`
6. Arbitrum One - `42161` - adapter `0x6F1002141Fcb5d3A3aA8b12A49e6e7DCE5661ae9`
7. Avalanche - `43114` - adapter `0xc64d6E64A713EfbbCcB14413479c56461F9c0b77`
8. Linea - `59144` - adapter `0x55E4da2cd634729064bEb294EC682Dc94f5c3f24`

## Relay

1. Submit signed orders with `POST https://agents-sink.orbs.network/orders/new`.
2. Query orders with `GET https://agents-sink.orbs.network/orders`; see [references/lifecycle.md](references/lifecycle.md) for filters, polling, and cancellation follow-up.

## Workflow

1. Read [references/quickstart.md](references/quickstart.md) for the minimum end-to-end flow.
2. Use [references/params.md](references/params.md) to map user intent into params, defaults, validation, and order-shape fields.
3. Use [references/sign.md](references/sign.md) to fill the template, handle approval, sign, and submit.
4. Use [references/lifecycle.md](references/lifecycle.md) for relay query semantics, status polling, and cancellation.
5. Use [references/examples.md](references/examples.md) only when the final relay payload shape is still unclear.
6. Use [assets/token-addressbook.md](assets/token-addressbook.md) only for optional token alias lookup on supported chains.
7. Use [assets/repermit.template.json](assets/repermit.template.json) as the canonical typed-data shape.
8. Treat `## Supported Chains` as the authoritative source for chain support and per-chain adapters.
9. Treat `## Relay` as the authoritative relay endpoint list.

## Guardrails

1. `## Supported Chains` is authoritative for chain support and per-chain adapters.
2. `## Relay` is authoritative for relay endpoints.
3. [assets/token-addressbook.md](assets/token-addressbook.md) is a convenience alias list only. It does not expand chain support or override explicit user-provided addresses.
4. This skill is instruction-only. Do not fetch or execute external helper code.
5. Normalize params with [references/params.md](references/params.md) before touching the template.
6. Replace only the `<...>` placeholders in [assets/repermit.template.json](assets/repermit.template.json). Keep the fixed protocol fields already in the template unchanged.
7. Default approval guidance is exact `approve(..., input.maxAmount)`. Standing `maxUint256` approval is opt-in convenience for repeat use, not the default suggestion.
8. Submit only the final signed payload as described in [references/sign.md](references/sign.md).

## Agent Contract

1. Turn the user request into a params JSON object using [references/params.md](references/params.md).
2. Normalize params locally, including defaults, rounding, and order-shape fields.
3. Confirm `chainId` is listed in `## Supported Chains`, then populate [assets/repermit.template.json](assets/repermit.template.json) from the normalized params and replace `<ADAPTER>` with that chain's listed adapter.
4. Handle approval, signing, and submission exactly as described in [references/sign.md](references/sign.md), and forward the returned signature unchanged.
5. Query and cancel exactly as described in [references/lifecycle.md](references/lifecycle.md).