refactor: consolidate IERC20 in src/interfaces, drop openzeppelin-contracts submodule#52
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…tracts submodule IERC20 was previously referenced three different ways across the repo: vendored at src/across/interfaces/IERC20.sol, imported from @openzeppelin/contracts in Debridge, and declared inline in test/Stargate.t.sol. All five Solidity sites and one test now share a single source at src/interfaces/IERC20.sol. The lib/openzeppelin-contracts submodule and its raw lib/... path import in test/DebridgeDln.t.sol go with it.
supervaulter
approved these changes
May 7, 2026
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IERC20was referenced three different ways across the repo: vendored atsrc/across/interfaces/IERC20.sol, imported from@openzeppelin/contractsin Debridge, and declared inline intest/Stargate.t.sol(withtest/DebridgeDln.t.soleven reaching directly intolib/...). This PR moves the canonical interface tosrc/interfaces/IERC20.sol, points all five Solidity sites and the inline test declaration at it, and drops thelib/openzeppelin-contractssubmodule (no other code in the repo referenced it). Net: one source of truth for the ERC-20 interface and one fewer submodule to clone.