feat(infra): USDT OFT Legacy Mesh warp route (Tron, Ethereum, Arbitrum)

[Mo-Hussain]

Summary

• Deployed USDT collateralOft warp route across ethereum, arbitrum, and tron using the USDT0 Legacy Mesh OFT bridge contracts
• Includes the SDK fix from feat(infra): USDT OFT warp route deployment + SDK fix for unproxied contracts #8507 (ProxyAdmin assertion for unproxied OFT contracts)
• Cherry-picked two commits from origin/main required for Tron support (not on audit-q2-2026)

Cherry-picks from main

These were needed because audit-q2-2026 doesn't have Tron mainnet support:

1. 2e622e8ab5 — feat(infra): add Tron mainnet deployment (#8356) — adds tron to supportedChainNames, agent config, validators, governance ICAs, gas prices
2. 77db7192a1 — fix(solidity): scope Tron SafeERC20 workaround to USDT address only (#8467) — required because TokenBridgeOft uses safeTransferFrom on Tron USDT which returns false on success

Deployed Contracts (Legacy Mesh)

Chain	Warp Route	Legacy Mesh OFT	Owner
arbitrum	0x9323793FB9a071ce5fE839079925c0e39f37170F	0x77652D5aba086137b595875263FC200182919B92	ICA 0xD2757B...
ethereum	0xC0dA8EF1225145E0b720d8A33471fa6360b7e73B	0x1F748c76dE468e9D11bd340fA9D5CBADf315dFB0	Safe 0x3965AC...
tron	0x43Bb7C9C64a05af94d67B52883a60756950058D7	0x3a08f76772e200653bb55c2a92998daca62e0e97	ICA 0xB96061...

Native vs Legacy Mesh

The USDT0 ecosystem has two separate OFT networks with different peer sets:

• Native Mesh (23+ chains): mint/burn — deployed in feat(infra): USDT OFT warp route deployment + SDK fix for unproxied contracts #8507 as USDT/oft
• Legacy Mesh (6 chains including Tron): credit-based lock/unlock, 0.03% fee

Tron is only in the Legacy Mesh, not the native mesh. A transfer from a native-only chain (e.g. plasma) to Tron requires two hops.

Test Transfers (0.1 USDT each via LayerZero)

Route	Tx	LayerZero Scan
Arbitrum → Ethereum	arbiscan	layerzeroscan
Arbitrum → Tron	arbiscan	layerzeroscan
Ethereum → Arbitrum	etherscan	layerzeroscan
Tron → Arbitrum	tronscan	layerzeroscan
Tron → Ethereum	tronscan	layerzeroscan

Related

• Native mesh PR: feat(infra): USDT OFT warp route deployment + SDK fix for unproxied contracts #8507
• Registry PR (native): feat: USDT/oft warp route deployment artifacts hyperlane-registry#1447
• Registry PR (legacy): feat: USDT/oft-legacy warp route deployment artifacts (Tron, Ethereum, Arbitrum) hyperlane-registry#1448

Test plan

• Production deployment on all 3 chains (including Tron via TronWallet)
• Test transfers in 5 directions via cast send (EVM) and TronWeb script (Tron)
• Ownership transferred to production addresses (safe/ICAs)

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 95.09804% with 5 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (audit-q2-2026@2057d1a). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             audit-q2-2026    #8512   +/-   ##
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  Coverage                 ?   79.28%           
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  Files                    ?      140           
  Lines                    ?     4190           
  Branches                 ?      409           
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  Hits                     ?     3322           
  Misses                   ?      840           
  Partials                 ?       28           

Flag	Coverage Δ
solidity	80.60% <ø> (?)
tron-sdk	72.34% <95.09%> (?)

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Components	Coverage Δ
core	87.80% <0.00%> (?)
hooks	78.11% <0.00%> (?)
isms	81.46% <0.00%> (?)
token	88.37% <0.00%> (?)
middlewares	88.02% <0.00%> (?)

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