feat: EIP-7954 — double max code size and initcode limit (Amsterdam)#12
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garyschulte merged 2 commits intoConsensys:mainfrom Apr 1, 2026
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functionally good, needs cleanup for maintainability
- MAX_CODE_SIZE: 24576 → 32768 (Amsterdam+) - MAX_INITCODE_SIZE: 49152 → 65536 (Amsterdam+) Applies conditional limits in validation.zig (tx CREATE check), host.zig (setupCreate + finalizeCreate), and call.zig (CREATE + CREATE2 opcode initcode guards). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: garyschulte <garyschulte@gmail.com>
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Summary
Implements EIP-7954 for the Amsterdam hardfork.
Doubles the contract size limits:
The new limits apply conditionally — pre-Amsterdam behaviour is unchanged.
Changes
src/handler/validation.zig— TX-level initcode size check uses65536for Amsterdam+src/interpreter/host.zig—setupCreateandfinalizeCreateuse32768/65536for Amsterdam+src/interpreter/opcodes/call.zig—CREATEandCREATE2initcode guards updatedPart of Amsterdam hardfork
Related PRs: EIP-7843 (SLOTNUM), EIP-8024 (DUPN/SWAPN/EXCHANGE), EIP-7708 (transfer logs), EIP-8037 (state gas reservoir)
Note
Medium Risk
Changes consensus-critical CREATE/CREATE2 validation and deployed-code limits gated on
SpecId.amsterdam, so incorrect gating or constant usage could cause fork-dependent execution mismatches.Overview
Implements EIP-7954 for Amsterdam by doubling contract size limits when
SpecId.amsterdamis enabled.CREATE/CREATE2 initcode size checks are updated across tx validation (
validation.zig), opcode execution (opcodes/call.zig), and host pre-exec guards (host.zig) to use65536(vs49152) for Amsterdam+. Deployed code size validation inHost.finalizeCreatenow uses32768(vs24576) for Amsterdam+.Adds shared primitives constants (
primitives.main.zig) forMAX_CODE_SIZE/MAX_INITCODE_SIZEand Amsterdam-specific doubled variants, and replaces scattered local constants/hardcoded limits with these spec-gated values.Written by Cursor Bugbot for commit b12e101. This will update automatically on new commits. Configure here.