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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| import { | ||
| batchLiquidatorAbi, | ||
| iBatchLiquidatorAbi, | ||
| } from "@gearbox-protocol/liquidator-v2-contracts/abi"; | ||
| import { BatchLiquidator_bytecode } from "@gearbox-protocol/liquidator-v2-contracts/bytecode"; | ||
| import { iCreditFacadeV3Abi } from "@gearbox-protocol/types/abi"; | ||
| import { type Address, parseEventLogs } from "viem"; | ||
|
|
||
| import type { CreditAccountData } from "../../data/index.js"; | ||
| import { | ||
| BatchLiquidationErrorMessage, | ||
| BatchLiquidationFinishedMessage, | ||
| } from "../notifier/messages.js"; | ||
| import AbstractLiquidator from "./AbstractLiquidator.js"; | ||
| import type { BatchLiquidationResult, ILiquidatorService } from "./types.js"; | ||
|
|
||
| export default abstract class BatchLiquidator | ||
| extends AbstractLiquidator | ||
| implements ILiquidatorService | ||
| { | ||
| #batchLiquidator?: Address; | ||
|
|
||
| public override async launch(): Promise<void> { | ||
| await super.launch(); | ||
| await this.#deployContract(); | ||
| } | ||
|
|
||
| public async liquidate(accounts: CreditAccountData[]): Promise<void> { | ||
| if (!accounts.length) { | ||
| return; | ||
| } | ||
| this.logger.warn(`Need to liquidate ${accounts.length} accounts`); | ||
| try { | ||
| const result = await this.#liquidateBatch(accounts); | ||
| this.notifier.notify( | ||
| new BatchLiquidationFinishedMessage( | ||
| result.liquidated, | ||
| result.notLiquidated, | ||
| result.receipt, | ||
| ), | ||
| ); | ||
| } catch (e) { | ||
| const decoded = await this.errorHandler.explain(e); | ||
| this.logger.error(decoded, "cant liquidate"); | ||
| this.notifier.notify( | ||
| new BatchLiquidationErrorMessage(accounts, decoded.shortMessage), | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| public async liquidateOptimistic( | ||
| accounts: CreditAccountData[], | ||
| ): Promise<void> { | ||
| const total = accounts.length; | ||
| this.logger.info(`optimistic batch-liquidation for ${total} accounts`); | ||
| const result = await this.#liquidateBatch(accounts); | ||
| this.logger.info( | ||
| `optimistic batch-liquidation finished: ${result.liquidated.length}/${total} accounts liquidated`, | ||
| ); | ||
| } | ||
|
|
||
| async #liquidateBatch( | ||
| accounts: CreditAccountData[], | ||
| ): Promise<BatchLiquidationResult> { | ||
| const input = accounts.map(ca => | ||
| this.pathFinder.getEstimateBatchInput(ca, this.config.slippage), | ||
| ); | ||
| const { result } = await this.client.pub.simulateContract({ | ||
| account: this.client.account, | ||
| address: this.batchLiquidator, | ||
| abi: iBatchLiquidatorAbi, | ||
| functionName: "estimateBatch", | ||
| args: [input] as any, // TODO: types | ||
| }); | ||
| this.logger.debug(result, "estimated batch"); | ||
| const { request } = await this.client.pub.simulateContract({ | ||
| account: this.client.account, | ||
| address: this.batchLiquidator, | ||
| abi: iBatchLiquidatorAbi, | ||
| functionName: "liquidateBatch", | ||
| args: [ | ||
| result.map(i => ({ | ||
| calls: i.calls, | ||
| creditAccount: i.creditAccount, | ||
| creditFacade: accounts.find( | ||
| ca => ca.addr === i.creditAccount.toLowerCase(), | ||
| )?.creditFacade!, // TODO: checks | ||
| })), | ||
| this.client.address, | ||
| ], | ||
| }); | ||
| const receipt = await this.client.liquidate(request as any, this.logger); // TODO: types | ||
|
|
||
| const logs = parseEventLogs({ | ||
| abi: iCreditFacadeV3Abi, | ||
| eventName: "LiquidateCreditAccount", | ||
| logs: receipt.logs, | ||
| }); | ||
| const liquidated = new Set( | ||
| logs.map(l => l.args.creditAccount.toLowerCase() as Address), | ||
| ); | ||
| return { | ||
| receipt, | ||
| liquidated: accounts.filter(a => liquidated.has(a.addr)), | ||
| notLiquidated: accounts.filter(a => !liquidated.has(a.addr)), | ||
| }; | ||
| } | ||
|
|
||
| async #deployContract(): Promise<void> { | ||
| this.#batchLiquidator = this.config.batchLiquidatorAddress; | ||
| if (!this.#batchLiquidator) { | ||
| this.logger.debug("deploying batch liquidator"); | ||
|
|
||
| let hash = await this.client.wallet.deployContract({ | ||
| abi: batchLiquidatorAbi, | ||
| bytecode: BatchLiquidator_bytecode, | ||
| args: [this.router], | ||
| }); | ||
| this.logger.debug( | ||
| `waiting for BatchLiquidator to deploy, tx hash: ${hash}`, | ||
| ); | ||
| const { contractAddress } = | ||
| await this.client.pub.waitForTransactionReceipt({ | ||
| hash, | ||
| timeout: 120_000, | ||
| }); | ||
| if (!contractAddress) { | ||
| throw new Error(`BatchLiquidator was not deployed, tx hash: ${hash}`); | ||
| } | ||
| this.#batchLiquidator = contractAddress; | ||
| } | ||
| this.logger.debug( | ||
| `using batch liquidator contract ${this.#batchLiquidator}`, | ||
| ); | ||
| } | ||
|
|
||
| private get batchLiquidator(): Address { | ||
| if (!this.#batchLiquidator) { | ||
| throw new Error("batch liquidator not deployed"); | ||
| } | ||
| return this.#batchLiquidator; | ||
| } | ||
| } |
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