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base repository: argotorg/fe
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  • 1 commit
  • 48 files changed
  • 1 contributor

Commits on Jan 30, 2026

  1. Adds proper EVM event logging support 

    Adds proper EVM event logging support for Fe. Structs marked with `#[event]`
  automatically get an `impl Event` generated at HIR lowering time.

  Key features:
  - `#[event]` attribute marks structs as loggable events
  - `#[indexed]` attribute on fields marks them as log topics (max 3)
  - Event signature hash (topic0) computed at compile-time via CTFE keccak
  - Non-indexed fields are ABI-encoded in the log data section
  - Uses existing `evm.emit()` API - now dispatches to proper logN opcodes

  Example:
  ```fe
  #[event]
  struct Transfer {
      #[indexed]
      from: Address,
      #[indexed]
      to: Address,
      value: u256,
  }

  evm.emit(Transfer { from, to, value })
  // Emits log3 with topic0=keccak("Transfer(address,address,uint256)")

  Validation errors for:
  - #[event] on non-struct items
  - #[indexed] outside #[event] structs
  - More than 3 indexed fields
  - Generic #[event] structs
  - Unsupported field types
    @cburgdorf
    cburgdorf committed Jan 30, 2026
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