vyperlang/vyper

View on GitHub

Pythonic Smart Contract Language for the EVM

Stars: 5.2k
Forks: 914
Open beginner issues: 0
Indexed issues: 545
Avg merge: 3d 13h
Merged PRs (30d): 25

Dominant language: Python
License: No license data
Last GitHub push: Sep 19, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Beginner friendly Everything

Open All

545 open issues indexed

Add support for `block.slotnum` Open

vyperlang/vyper#5259 · 2 comments · 1 assignee · Opened Sep 10, 2026
Issue compiling ternary ifs Open

bug bug - codegen bug - type 0 bug - venom codegen

Difficulty 3/5 1-2 days Newbie friendliness 65/100

vyperlang/vyper#5251 · Opened Sep 8, 2026
Support unbounded struct fields and nested sequence elements (follow-up to #4856 and #5240) Open

vyperlang/vyper#5247 · 8 comments · 2 assignees · Opened Sep 4, 2026
Venom: an unrelated bounded-array function makes a four-byte runtime-sized call cost 34M gas Open

vyperlang/vyper#5244 · 1 assignee · Opened Sep 4, 2026
InvalidOperation on `[[]][i]` Open

bug bug - type 0 bug - typechecker

vyperlang/vyper#5243 · 1 assignee · Opened Sep 4, 2026
archive output is silently broken when relative imports cross above cwd Open

Difficulty 4/5 3-5 days Newbie friendliness 56/100

vyperlang/vyper#5226 · Opened Aug 28, 2026
Typing and constant folding are intertwined Open

Constant Folder enhancement Feature Refactor

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

vyperlang/vyper#5213 · Opened Aug 11, 2026
Panic on empty list literal expression Open

bug bug - codegen bug - type 0

Difficulty 3/5 1-2 days Newbie friendliness 58/100

vyperlang/vyper#5199 · Opened Jul 22, 2026
we should have a more sophisticated analysis for `self.<immutable>` Open

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

vyperlang/vyper#5178 · 3 comments · Opened Jul 2, 2026
`_get_bool_kwargs` is duplicated and possibly wrong Open

Refactor venom

Difficulty 3/5 1-2 days Newbie friendliness 55/100

vyperlang/vyper#5173 · Opened Jun 29, 2026
Deeply nested array type crashes with raw RecursionError Open

bug - UX

vyperlang/vyper#5157 · 4 comments · 1 assignee · Opened Jun 24, 2026
`empty` does not constant fold Open

bug - type 0 Constant Folder

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vyperlang/vyper#5153 · 9 comments · Opened Jun 24, 2026
Writing self.balance panics under Venom codegen Open

bug - type 0 bug - typechecker

vyperlang/vyper#5151 · 1 comment · 1 assignee · Opened Jun 24, 2026
Missing documentation about the evaluation order Open

documentation

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

vyperlang/vyper#5148 · 2 comments · Opened Jun 23, 2026
block.prevhash skips clamps unlike documented equivalent Open

bug - documentation

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vyperlang/vyper#5146 · 3 comments · Opened Jun 21, 2026
Interface accepts self param but implementation rejects Open

bug - typechecker bug - UX

vyperlang/vyper#5143 · 1 assignee · Opened Jun 21, 2026
Venom pipeline emits sparse runtime source map Open

bug - integration venom

vyperlang/vyper#5141 · 1 comment · 1 assignee · Opened Jun 21, 2026
Venom accepts non-literal raw_args in create_from_blueprint Open

bug - venom Constant Folder

Difficulty 3/5 1-2 days Newbie friendliness 68/100

vyperlang/vyper#5139 · 2 comments · Opened Jun 21, 2026
Assign to call-return index crashes compiler Open

bug - type 0

vyperlang/vyper#5138 · 3 comments · 1 assignee · Opened Jun 21, 2026
Indexed struct event field accepted then unusable Open

bug - type 0 bug - typechecker

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

vyperlang/vyper#5137 · Opened Jun 21, 2026
Venom pipeline drops static assert-false compile-time check Open

bug - codegen bug - type 1 bug - venom codegen venom

Difficulty 3/5 1-2 days Newbie friendliness 74/100

vyperlang/vyper#5136 · Opened Jun 21, 2026
raw_create skips revert check under experimental codegen Open

bug - type 1 bug - venom codegen needs triage venom

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vyperlang/vyper#5125 · 4 comments · Opened Jun 12, 2026
Invalid JSON ABI stateMutability raises CompilerPanic Open

bug - type 0 parser sev - low

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

vyperlang/vyper#5123 · 1 comment · Opened Jun 12, 2026
Missing event indexed field causes compiler panic Open

needs triage

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

vyperlang/vyper#5120 · Opened Jun 12, 2026
Malformed JSON interface import crashes compiler with empty panic Open

needs triage

vyperlang/vyper#5119 · 2 comments · 1 assignee · Opened Jun 12, 2026
Bare-type builtin arg leaks raw CPython AttributeError in Venom Open

bug - UX bug - venom

vyperlang/vyper#5118 · 1 comment · 1 assignee · Opened Jun 12, 2026
proposal: move convert() conversion-legality validation into the frontend typechecker Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

vyperlang/vyper#5117 · 1 comment · Opened Jun 12, 2026
venom test lanes validate against legacy codegen: output formats mask venom bugs, fuzzing lane never runs venom Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vyperlang/vyper#5116 · 3 comments · Opened Jun 12, 2026
Bundle output format panics on out-of-tree path Open

bug - integration bug - UX

Difficulty 3/5 1-2 days Newbie friendliness 70/100

vyperlang/vyper#5113 · 1 comment · Opened Jun 12, 2026
venom: `convert()` missing input-type validation accepts conversions legacy rejects Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vyperlang/vyper#5111 · Opened Jun 12, 2026
venom: `int -> decimal` lower-bound clamp off by one, returns out-of-range decimal Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

vyperlang/vyper#5110 · Opened Jun 12, 2026
`in`/`not in` folding of `bytesM` literals is case-sensitive Open

bug - type 1 Constant Folder

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

vyperlang/vyper#5104 · Opened Jun 12, 2026
broken validation in get_storage_layout_overrides silently drops extra overrides Open

needs triage

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

vyperlang/vyper#5076 · Opened Jun 12, 2026
spurious integrity mismatch warning on solc_json round trip with storage layout overrides Open

bug - type 0 parser

Difficulty 3/5 1-2 days Newbie friendliness 58/100

vyperlang/vyper#5074 · Opened Jun 12, 2026
Venom: decoder clamp ports dropped boundedness sanity asserts Open

codegen enhancement venom

Difficulty 3/5 1-2 days Newbie friendliness 52/100

vyperlang/vyper#5064 · Opened Jun 12, 2026
Venom: remove unreachable branches in expr.py Open

vyperlang/vyper#5063 · 1 assignee · Opened Jun 12, 2026
Venom: DynArray.append capacity check runs after argument side effects Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

vyperlang/vyper#5058 · 3 comments · Opened Jun 12, 2026
Venom: codegen does not enforce block scopes and mutability defensively Open

needs triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vyperlang/vyper#5057 · Opened Jun 12, 2026
Venom: ABI decoder copies bytestring maxlen instead of runtime length Open

needs triage

Difficulty 4/5 3-5 days Newbie friendliness 68/100

vyperlang/vyper#5056 · Opened Jun 12, 2026
Venom: array-subscript index side effects can stale the base pointer Open

bug - type 1 bug - venom codegen venom

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vyperlang/vyper#5054 · Opened Jun 12, 2026
Venom: constructor immutables do not bump msize before dynamic allocation Open

needs triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vyperlang/vyper#5053 · Opened Jun 12, 2026
Venom: runtime/deploy function ID reuse can collide in multi-module constructors Open

bug - type 0 bug - venom codegen venom

Difficulty 4/5 3-5 days Newbie friendliness 52/100

vyperlang/vyper#5052 · Opened Jun 12, 2026
Venom: augmented assignment missing read/write overlap guard Open

bug - type 1 bug - venom codegen venom

Difficulty 4/5 3-5 days Newbie friendliness 52/100

vyperlang/vyper#5051 · Opened Jun 12, 2026
Venom: call arguments can observe later side effects Open

bug - type 1 bug - venom codegen venom

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vyperlang/vyper#5050 · Opened Jun 12, 2026
MemSSA phi operands are computed before the memory-SSA fixed point Open

codegen Refactor

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vyperlang/vyper#5047 · Opened Jun 11, 2026
IRAnalysesCache fallback global cache does not register self Open

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

vyperlang/vyper#5046 · Opened Jun 11, 2026
Proto-VIP: Refactor `send` to avoid footgun Open

bug - UX enhancement Feature

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

vyperlang/vyper#5031 · 3 comments · Opened Jun 4, 2026
JSON export: make machine-independent artifacts possible Open

Feature

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vyperlang/vyper#5021 · 5 comments · Opened May 29, 2026
Venom convert address/flag to decimal omits divisor Open

bug - venom needs triage venom

Difficulty 3/5 1-2 days Newbie friendliness 68/100

vyperlang/vyper#5019 · Opened May 27, 2026
Venom abi_encode drops HexBytes method_id silently Open

bug - type 1 bug - venom needs triage venom

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

vyperlang/vyper#5018 · 1 comment · Opened May 27, 2026

vyperlang/vyper

Get new issues in your inbox