Compiler Diagnostics for Standards
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Overview
The compiler emits actionable diagnostics when it detects Ethereum patterns that need migration. These help catch common mistakes during ERC → NEP porting:
| Code | Pattern Detected | Suggestion |
|---|---|---|
W101 | transfer(to, amount) — 2-param ERC-20 | Add from and data params for NEP-17 |
W102 | transfer(from, to, amount) — 3-param partial | Add data parameter for NEP-17 |
W103 | approve/allowance/transferFrom present | Not in NEP-17 spec; keep as extensions or remove |
W104 | transferFrom(from, to, tokenId) — ERC-721 | Replace with transfer(to, tokenId, data) |
W105 | receive() / fallback() present | Replace with onNEP17Payment callback |
W106 | supportsInterface(bytes4) present | Remove — manifest handles interface detection |
W107 | ERC-1155 multi-token pattern | Split into separate NEP-17 and NEP-11 contracts |
W108 | ERC-2612 permit (7-param) | Use Runtime.checkWitness() instead |