Liquidator redesign: liquidation, rebalancing, swap implementation and testing.

[vitaliybezz]

• Complete refactoring of Liquidation bot with modular, extendible, self-contained architecture.
• Inventory-based liquidation model - bot maintains asset balances and liquidates using available inventory.
• NEAR Intents integration via 1-Click API for post liquidation swaps.
• Market scans with allowlists and ignore-lists by asset.
• Both NEP-141 and NEP-245 liquidations (tested).
• Full and partial liquidation strategies.
• Multiple collateral management strategies (hold, swap to borrow, swap to primary).
• Detailed tracking and logging throughout
• Dockerization.

TODO next:

• Swapchain using multiple swap providers (1Click, Ref/Rhea, Near Fast unstake etc).
• Ref/Rhea integration and testing (It is implemented, but not tested yet).
• Pre-liquidation swap if needed.

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This change is 

[codecov]

Codecov Report

❌ Patch coverage is 26.85994% with 2094 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
bots/liquidator/src/swap/oneclick.rs	0.00%	409 Missing ⚠️
bots/liquidator/src/swap/ref.rs	0.00%	350 Missing ⚠️
bots/liquidator/src/service.rs	0.00%	321 Missing ⚠️
bots/liquidator/src/rebalancer.rs	0.00%	290 Missing ⚠️
bots/liquidator/src/inventory.rs	48.19%	273 Missing ⚠️
bots/liquidator/src/profitability.rs	69.36%	68 Missing ⚠️
bots/liquidator/src/config.rs	79.00%	59 Missing ⚠️
bots/liquidator/src/rpc.rs	56.30%	52 Missing ⚠️
bots/liquidator/src/executor.rs	0.00%	48 Missing ⚠️
bots/liquidator/src/liquidator.rs	0.00%	43 Missing ⚠️
... and 16 more

📢 Thoughts on this report? Let us know!

[royalf00l]

Overall looks good, just some minor details.

Ideally there would be some more test coverage on the liquidator as well since it's a backend service.

Also worth noting that the first next step is supporting deposits into intents and withdraws from intents. https://docs.near-intents.org/near-intents/market-makers/passive-deposit-withdrawal-service. This is necessary for liquidators who don't keep stables always deposited on Intents or want to liquidate collateral on other venues

[github-actions]

Name	Deployment
Registry	gh-283.templar-in-training.testnet
Default market	default-19242841901.gh-283.templar-in-training.testnet

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Installed near-sandbox into /home/runner/work/contracts/contracts/target/debug/build/near-sandbox-utils-2ad3b5a56a37a3e2/out/.near/near-sandbox-2.8.0/near-sandbox

Gas Report

Snapshot Limits

harvest_yield

Iterations	Gas
0	3.5 Tgas
391	14.9 Tgas

Estimated snapshot limit: 9635

apply_interest

Iterations	Gas
0	3.6 Tgas
391	13.2 Tgas

Estimated snapshot limit: 11505

Action Gas Descriptors

Action	Gas
collateralize	12.5 Tgas
withdraw_collateral	9.4 Tgas
borrow	14.9 Tgas
repay	13.8 Tgas
supply	8.5 Tgas
create_supply_withdrawal_request	3.1 Tgas
execute_next_supply_withdrawal_request	11.4 Tgas

[peer2f00l]

Just small things that can be cleaned later. LGTM.

[petarvujovic98]

I like the new abstractions to balance and inventory management.
In general looks good, just a few nits here and there, but not blockers