Research corpus ScalingBLC-STUDY-0335

Reject new contract code starting with the 0xEF byte

EIP 3541, Reject new contract code starting with the 0xEF byte. Disallow new code starting with the 0xEF byte to be deployed.

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Record

Authors: Alex Beregszaszi , Paweł Bylica , Andrei Maiboroda , Alexey Akhunov , Christian Reitwiessner , Martin Swende
Date: 2021
Publisher: Alex Beregszaszi , Paweł Bylica , Andrei Maiboroda , Alexey Akhunov , Christian Reitwiessner , Martin Swende
Version: Source cited by the 2021 study. The study is the reading. This page does not add a second essay.
Document ID: BLC-STUDY-0335
DOI: None recorded
Last reviewed: 1 October 2026
Licence: No licence recorded. Rights status under review.

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Direct answer

EIP 3541, Reject new contract code starting with the 0xEF byte. Disallow new code starting with the 0xEF byte to be deployed.

Where to read

Official source — EIP 3541
Blockchain Lab study, the canonical readingOriginal commentary. Not a transcription of the paper.

Metadata and commentary only. The reading is the study page.

Full text

Full text is not published on this page. Public availability is not a licence to republish a document. Blockchain Lab has not recorded a licence that permits an HTML transcription, a training set, or a retrieval corpus of the paper. Text on this page is Blockchain Lab's own wording, or a pointer to a study that is also Blockchain Lab's wording.

What changed

Status in the source: Final. A reading of the public specification, not a copy of it and not a certification.

Relationships

Canonical readingEIP 3541 study
Related paperEIP-4844
Related paperPlasma
Related paperArbitrum

Cite this record

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Author–date

Beregszaszi, A., Bylica, P., Maiboroda, A., Akhunov, A., Reitwiessner, C., & Swende, M. (2021). Reject new contract code starting with the 0xEF byte. Alex Beregszaszi , Paweł Bylica , Andrei Maiboroda , Alexey Akhunov , Christian Reitwiessner , Martin Swende. https://eips.ethereum.org/EIPS/eip-3541

BibTeX

@techreport{eip35412021,
  title = {Reject new contract code starting with the 0xEF byte},
  author = {Alex Beregszaszi , Paweł Bylica , Andrei Maiboroda , Alexey Akhunov , Christian Reitwiessner , Martin Swende},
  year = {2021},
  institution = {Alex Beregszaszi , Paweł Bylica , Andrei Maiboroda , Alexey Akhunov , Christian Reitwiessner , Martin Swende},
  url = {https://eips.ethereum.org/EIPS/eip-3541},
  note = {Rights status: Official external source only. Blockchain Lab record: https://blockchainlab.com/research/corpus/papers/eip-3541}
}

RIS

TY  - RPRT
TI  - Reject new contract code starting with the 0xEF byte
AU  - Alex Beregszaszi
AU  - Paweł Bylica
AU  - Andrei Maiboroda
AU  - Alexey Akhunov
AU  - Christian Reitwiessner
AU  - Martin Swende
PY  - 2021
PB  - Alex Beregszaszi , Paweł Bylica , Andrei Maiboroda , Alexey Akhunov , Christian Reitwiessner , Martin Swende
UR  - https://eips.ethereum.org/EIPS/eip-3541
N1  - Rights status: Official external source only
ER  -

CSL-JSON

[
  {
    "type": "report",
    "id": "BLC-STUDY-0335",
    "title": "Reject new contract code starting with the 0xEF byte",
    "author": [
      {
        "literal": "Alex Beregszaszi"
      },
      {
        "literal": "Paweł Bylica"
      },
      {
        "literal": "Andrei Maiboroda"
      },
      {
        "literal": "Alexey Akhunov"
      },
      {
        "literal": "Christian Reitwiessner"
      },
      {
        "literal": "Martin Swende"
      }
    ],
    "issued": {
      "date-parts": [
        [
          2021
        ]
      ]
    },
    "publisher": "Alex Beregszaszi , Paweł Bylica , Andrei Maiboroda , Alexey Akhunov , Christian Reitwiessner , Martin Swende",
    "URL": "https://eips.ethereum.org/EIPS/eip-3541",
    "note": "Rights status: Official external source only. Not a licence to republish the paper."
  }
]

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Rights record

Source status: Official source
Use status: Metadata and commentary only. The reading is the study page.
Rights: Official external source only
Training and retrieval: Not permitted from this site. There is no rights-cleared full text to retrieve or to train on.

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