feat(rebalancer): implement LayerZeroBridge IExternalBridge#8347
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Mo-Hussain
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Apr 1, 2026
| // Contract Addresses | ||
| // ============================================================================ | ||
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| export const OFT_CONTRACTS: Record<number, Record<number, string>> = { |
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Are there layerzero packages that we can import to provide these addresses?
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All alerts resolved. Learn more about Socket for GitHub. This PR previously contained dependency changes with security issues that have been resolved, removed, or ignored. |
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…d detectNetwork failure
…] not messages[])
Tron is not supported for rebalancing. Removed all Tron-specific code: TronWebLike type, toTronHexAddress/toEvmAddress helpers, Tron branches in quote()/execute(), waitForTronTx(), isTronChain(), normalizeTronAddress(), Tron entries from chain/contract mappings, Tron tests, and tronweb dependency.
Replaced custom addressToBytes32 in layerZeroUtils with delegation to @hyperlane-xyz/utils addressToBytes32. Removed custom toBigInt() helper in favor of BigInt(value.toString()) which handles ethers BigNumber.
Replaced hardcoded route pairs with a lookup against OFT_CONTRACTS, eliminating duplication between the route table and the validation check.
…mEID These were not referenced outside layerZeroUtils.ts.
Tests and mocks used 7758 for Plasma but OFT_CONTRACTS uses 9745 (the Hyperlane domain ID). Fixed to match the route configuration.
The USDT0 OFT program on Solana uses a custom OFTStore layout where tokenMint starts at byte 8 (immediately after the discriminator), unlike the standard SDK layout which expects oftType + ld2sdRate first. This caused the SDK's fetchOFTStore() to fail with EnumDiscriminatorOutOfRangeError. Replace the SDK deserializer with a raw account data read that extracts tokenEscrow directly from its known offset (byte 40).
The LZ SDK's SendHelper.getQuoteAccounts/getSendAccounts fails when passed web3.js PublicKey objects due to module instance mismatch with the instanceof check. Convert to UMI public key strings before passing.
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Summary
LayerZeroBridgeas a newIExternalBridgethat calls LayerZero OFT/Legacy Mesh contracts directly to bridge USDT between Ethereum (EID 30101), Arbitrum (EID 30110), Plasma (EID 30383), and Tron (EID 30420)ExternalBridgeType.LayerZeroinRebalancerContextFactoryDetails
New files:
LayerZeroBridge.ts(535 lines) —quote(),execute(),getStatus()implementingIExternalBridgelayerZeroUtils.ts(270 lines) — route config, ABI fragments, EID/chain mappings, helper functionsLayerZeroBridge.test.ts(525 lines) — 17 tests covering quote, execute, getStatus, error pathslayerZeroMocks.ts(189 lines) — test mocks for providers and TronWebModified files:
config/types.ts— addedExternalBridgeType.LayerZero = 'layerzero'andLayerZeroExternalBridgeConfigRebalancerContextFactory.ts— wiredLayerZeroBridgeintobuildExternalBridgeRegistry()package.json— addedtronweb: "catalog:"dependencyDesign decisions:
import('tronweb')(no top-level import)IExternalBridgeinterface orLiFiBridge.ts