multiformats/multicodec

View on GitHub

Compact self-describing codecs. Save space by using predefined multicodec tables.

Stars: 383
Forks: 221
Open beginner issues: 0
Indexed issues: 42
Avg merge: 24d 6h
Merged PRs (30d): 1

Dominant language: Python
License: MIT
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Beginner friendly Everything

Open All

42 open issues indexed

Affirm or replace "first come first assign" Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

multiformats/multicodec#410 · 5 comments · Opened Aug 5, 2026
Hybrid Post-Quantum primitive codecs Open

Difficulty 5/5 Over a week Newbie friendliness 42/100

multiformats/multicodec#408 · Opened Aug 2, 2026
A few codecs are missing their counterparts (pub/priv keys) Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

multiformats/multicodec#389 · Opened Sep 18, 2025
PGP public keys Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

multiformats/multicodec#381 · 4 comments · Opened May 24, 2025
Add multihash code for AES-CMAC Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

multiformats/multicodec#368 · 1 comment · Opened Jan 4, 2025
Multicodec Idea: HTTP Response as one codec? HTTP Request as a second? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

multiformats/multicodec#360 · 1 comment · 1 reaction · Opened Oct 10, 2024
Proposal: rename repo to multicodec-table Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

multiformats/multicodec#346 · 6 comments · Opened Apr 8, 2024
Rust implementation built by someone on the libp2p team Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

multiformats/multicodec#337 · 6 comments · Opened Oct 9, 2023
npm package Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

multiformats/multicodec#327 · 7 comments · Opened Jun 5, 2023
Add JSON form of the table Open

multiformats/multicodec#305 · 7 comments · 1 reaction · 1 assignee · Opened Dec 6, 2022
Add varint encoding of code to table Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

multiformats/multicodec#297 · 1 comment · Opened Oct 25, 2022
Keyed hashes (SipHash) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

multiformats/multicodec#265 · 1 comment · Opened Apr 13, 2022
Options for adding docs and test fixtures for multicodec entries Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

multiformats/multicodec#240 · 1 comment · Opened Nov 4, 2021
Test Vectors Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

multiformats/multicodec#232 · 1 comment · Opened Sep 28, 2021
missing several variations of sha2 Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

multiformats/multicodec#205 · 3 comments · Opened Feb 7, 2021
Qualifications for identification as a "codec" Open

multiformats/multicodec#204 · 10 comments · 2 reactions · 4 assignees · Opened Jan 22, 2021
document recommendations for multicodec implementations Open

Difficulty 2/5 Half a day Newbie friendliness 45/100

multiformats/multicodec#199 · 3 comments · Opened Sep 24, 2020
Automate codec updates across libraries Open

help wanted

Difficulty 5/5 Over a week Newbie friendliness 25/100

multiformats/multicodec#183 · 2 comments · 1 reaction · Opened Jul 21, 2020
Codec proposal: N-Quads (RDF format) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

multiformats/multicodec#180 · 9 comments · Opened Jun 30, 2020
Recursive structures of primitive codecs Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

multiformats/multicodec#174 · 4 comments · Opened May 14, 2020
Automated PR Response Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

multiformats/multicodec#163 · 1 comment · 1 reaction · Opened Mar 9, 2020
Create initial public release Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

multiformats/multicodec#162 · 6 comments · Opened Feb 18, 2020
Reserving ranges Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

multiformats/multicodec#158 · 4 comments · Opened Jan 31, 2020
Sorting in "Sortable Table" is broken. Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

multiformats/multicodec#156 · 1 comment · 1 reaction · Opened Jan 30, 2020
Whats the data format (or is it compatible) for "bmt multihash 0xd6 Binary Merkle Tree Hash" to hash binary forest pairs that define a function that returns byte[] id of another object (id of an id generator then its id)? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

multiformats/multicodec#153 · 3 comments · Opened Dec 23, 2019
URDNA2015 Support Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

multiformats/multicodec#149 · 1 comment · Opened Nov 19, 2019
Add BD_ADDR Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

multiformats/multicodec#147 · 9 comments · Opened Sep 3, 2019
Request: perceptual and/or locality sensitive hash functions? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

multiformats/multicodec#135 · Opened May 31, 2019
Missing codec: raw string Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

multiformats/multicodec#127 · 4 comments · Opened Apr 10, 2019
Java Multicodec Implementation Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

multiformats/multicodec#112 · 8 comments · Opened Jan 17, 2019
Request: encryption schemes Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

multiformats/multicodec#110 · 1 comment · Opened Jan 16, 2019
Request: Serialization Formats Open

missing codec

Difficulty 4/5 3-5 days Newbie friendliness 25/100

multiformats/multicodec#107 · 3 comments · 3 reactions · Opened Jan 3, 2019
Request: Media Container Formats Open

missing codec

Difficulty 4/5 3-5 days Newbie friendliness 20/100

multiformats/multicodec#106 · Opened Jan 3, 2019
Request: Archive Formats Open

missing codec

Difficulty 2/5 1-3 hours Newbie friendliness 30/100

multiformats/multicodec#105 · 2 reactions · Opened Jan 3, 2019
Add Swarm hashes as a multicodec type Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

multiformats/multicodec#95 · Opened Dec 3, 2018
add crypto key types Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

multiformats/multicodec#83 · 1 comment · Opened Sep 7, 2018
Add application specific/development codecs Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

multiformats/multicodec#74 · 2 comments · 4 reactions · Opened Apr 4, 2018
Possibly deduplicate raw/identity Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

multiformats/multicodec#71 · Opened Jan 31, 2018
Automate table sync between repos Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

multiformats/multicodec#40 · 2 comments · Opened Mar 1, 2017
Table: Application specific ranges Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

multiformats/multicodec#39 · 10 comments · 1 reaction · Opened Feb 26, 2017
Define multicodec's prefix Open

question

Difficulty 5/5 Over a week Newbie friendliness 25/100

multiformats/multicodec#6 · Opened Jul 31, 2016
Mimetypes as codes Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

multiformats/multicodec#4 · 14 comments · 7 reactions · Opened May 22, 2016

multiformats/multicodec

Get new issues in your inbox