v1.5.14

• Breaking: Enforce EIP-170 contract size limit (24,576 bytes) by default.
  • Compilation now fails if the runtime bytecode exceeds the EIP-170 limit.
  • Use --no-size-limit flag to bypass this check.
• Increase maximum loop iterations from 10,000 to 100,000.
• Update to foundry v1.6.0-rc1.

v1.5.13

• Add support for true and false keywords as constant override values via -c CLI flag.
  • Example: hnc test.huff -c DEBUG=true
  • true is equivalent to 0x01, false is equivalent to 0x00.

v1.5.12

• Fix lexer not handling UTF-8 characters correctly in comments.
  • Multi-byte UTF-8 characters (e.g., →) in comments caused incorrect span positions for subsequent tokens.
  • The lexer now properly tracks byte positions instead of character indices.

v1.5.11

• Fix broken npm release workflow.

v1.5.9

• Add support to pass builtin functions to __VERBATIM.
  • __VERBATIM can now wrap builtins that generate PUSH + value, stripping the PUSH opcode.
  • Supported: __FUNC_SIG, __EVENT_HASH, __BYTES, __ERROR, __RIGHTPAD, __LEFTPAD.
  • Example: __VERBATIM(__FUNC_SIG("withdraw(uint256)")) emits raw 4-byte selector without PUSH4.
• EVM version Osaka is now the default.
• Update to foundry v1.5.1.

v1.5.8

• Fix __RIGHTPAD() incorrectly padding odd-length hex values.
  • Example: __RIGHTPAD(0x1af) now produces 0x1af000... instead of 0x01af00....
• Reject 0x as valid hex value. Before it was treated as 0x00 (fixes #154).
• Update to foundry v1.5.0.

v1.5.7

• Fix jump placeholders not resolved when --relax-jumps enabled but no optimization occurs.
  • Jump placeholders (xxxx) remained unresolved in the bytecode.

v1.5.6

• Fix constants defined with builtin functions not working in code tables (fixes #149).
  • Example: #define constant C = __RIGHTPAD(0x) can now be used in tables with [C].
• Add support for string literal constants with __BYTES builtin function.
  • String constants can be defined: #define constant GREETING = "hello".
  • String constants must be used with __BYTES: __BYTES([GREETING]) converts to UTF-8 bytes.
  • Example: #define constant MSG = "hello" then __BYTES([MSG]) produces 0x68656c6c6f.
• Add support for constant references in __VERBATIM builtin function.
  • __VERBATIM can now accept constant references: __VERBATIM([MY_CONSTANT]).
  • Example: #define constant SIG = __FUNC_SIG("transfer(address,uint256)") then __VERBATIM([SIG]).

v1.5.5

• Fix --relax-jumps not updating label positions always correct during iterative optimization.
  • Fix jump table entries are now correctly updated after each relaxation iteration.
  • Fixes issue where jumps at the PUSH1/PUSH2 boundary (byte 255/256) were not optimized.
  • Use correct PC for __ASSERT_PC after jump relaxation.
• Correctly handle decimal literals in for loop bounds (have been interpreted as hex before).
  • Example: for(i in 0..255) and for(i in 0..0xff) are now equivalent.
• Add __EMBED_TABLE(TABLE_NAME) builtin function to embed code tables inline.
  • Embeds table bytes at the current position instead of at the end of bytecode.
  • Each table can only be embedded once to avoid ambiguity.
  • __tablestart(TABLE) returns the inline embedding position for embedded tables.
• Add support for keccak256 opcode as an alias for sha3 (fixes #145).
  • Both keccak256 and sha3 compile to the same EVM opcode (0x20).
• Fix built-in functions not working inside if-statement bodies (fixes #144).
  • Example: if (true) { __RIGHTPAD(0x1234) }

v1.5.4

• Add support for true and false boolean literals in if conditions and macro arguments.
  • true evaluates to 0x01, false evaluates to 0x00.
  • Example: if (true) { 0xAA } else { 0xBB }
• Fix macro argument scoping bug where parameters leaked across macro boundaries (fixes #139).
  • Macros can no longer access parameters from parent scopes unless explicitly passed.
  • Example: If M1(arg) calls M2() without passing arg, then M2 cannot use <arg>.
• Fix nested macro invocation resulted in stack overflow (fixes #140).
  • Example: M1(M1(M1(<a>)))