onflow/cadence

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Cadence: the resource-oriented smart contract programming language of the Flow network. Capability-based security, type safety, and move semantics

Stars: 548
Forks: 152
Open beginner issues: 0
Indexed issues: 140
Avg merge: 1h 15m
Merged PRs (30d): 1

Dominant language: Go
License: Apache-2.0
Last GitHub push: Sep 2, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Beginner friendly Everything

Open All

140 open issues indexed

Test.expectFailure does not output the error message Open

Feature Feedback

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

onflow/cadence#4475 · Opened Apr 18, 2026
Compiler/VM Optimizations Open

Performance

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

onflow/cadence#4364 · Opened Nov 26, 2025
Ensure generic-types are always resolved at runtime Open

Improvement Technical Debt

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

onflow/cadence#4337 · Opened Nov 13, 2025
Re-use flow execution effort transactions Open

Feature

onflow/cadence#4329 · 1 assignee · Opened Nov 10, 2025
Feature Request: Get Account object that can only access specific storage and public paths Open

Feature Feedback

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

onflow/cadence#4314 · 30 comments · 4 reactions · Opened Oct 27, 2025
Math operations improvements Open

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

onflow/cadence#4308 · Opened Oct 21, 2025
Prepare Cadence compiler for deployment Open

onflow/cadence#4307 · 2 assignees · Opened Oct 21, 2025
Peephole optimizations Open

onflow/cadence#4305 · 1 assignee · Opened Oct 17, 2025
Disallow import of structs with access(contract) initializers Open

Feature Feedback Improvement

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

onflow/cadence#4304 · 1 reaction · Opened Oct 17, 2025
🎯 Cadence Language goals - Q4 2025 Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

onflow/cadence#4280 · Opened Oct 10, 2025
[Compiler] Optimize conversion between static and sema types Open

Improvement

onflow/cadence#4273 · 1 comment · 1 assignee · Opened Oct 9, 2025
Remaining work to transition to new unified `NativeFunction` Open

Technical Debt

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

onflow/cadence#4263 · Opened Oct 7, 2025
Support rounding modes in fixed point types Open

Feature

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

onflow/cadence#4244 · Opened Sep 26, 2025
Lazily allocate bookkeeping structures (e.g. VM context maps) Open

Improvement

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

onflow/cadence#4239 · Opened Sep 24, 2025
Update Import Error to Mention String Format Open

Feature Feedback

Difficulty 3/5 1-2 days Newbie friendliness 38/100

onflow/cadence#4235 · Opened Sep 23, 2025
Update tool doesn't detect versions of multi-project repos Open

Bug Feedback

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

onflow/cadence#4212 · Opened Sep 10, 2025
Upgrade [U]Fix64 to new implementation Open

Technical Debt

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

onflow/cadence#4127 · Opened Aug 1, 2025
🎯 Cadence Language goals - Q3 2025 Open

Difficulty 5/5 Over a week Newbie friendliness 10/100

onflow/cadence#4057 · Opened Jul 4, 2025
Add transaction sema-to-static type conversion Open

Improvement Technical Debt

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

onflow/cadence#4048 · Opened Jun 25, 2025
🎯 Cadence Language goals - Q2 2025 Open

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

onflow/cadence#4026 · Opened Jun 17, 2025
Post-C1.0 cleanup Open

Technical Debt

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

onflow/cadence#3906 · Opened Apr 28, 2025
Compiler Milestone X Open

Feature Feedback

onflow/cadence#3804 · 2 comments · 3 assignees · Opened Feb 27, 2025
🎯 Cadence Language goals - Q1 2025 Open

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

onflow/cadence#3726 · Opened Jan 15, 2025
Infer type arguments when type parameter is used as return type Open

Feature Feedback

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

onflow/cadence#3712 · Opened Dec 10, 2024
Avoid conversion from `StaticType` to `sema.Type` during runtime sub-type checking Open

Improvement Performance

onflow/cadence#3691 · 2 comments · 1 assignee · Opened Nov 21, 2024
Get a list of all cases of an enum Open

Feature Good First Issue

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

onflow/cadence#3671 · 4 comments · 2 reactions · Opened Nov 4, 2024
Expose CCF to Cadence programs Open

Feature Feedback

onflow/cadence#3637 · 1 comment · 1 assignee · Opened Oct 22, 2024
Refactor string interpolation to separate parsing logic Open

Good First Issue Technical Debt

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

onflow/cadence#3624 · Opened Oct 18, 2024
Write Cadence scientific paper Open

onflow/cadence#3613 · 2 assignees · Opened Oct 10, 2024
Remove shift type constraint Open

Feedback Improvement

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

onflow/cadence#3607 · 2 comments · Opened Oct 9, 2024
Cadence Language Formal Specification Open

Documentation

onflow/cadence#3599 · 1 assignee · Opened Oct 7, 2024
Cadence storage interaction limit exceeded when retrieving large collections Open

Feedback Improvement Question

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

onflow/cadence#3577 · 3 comments · Opened Sep 9, 2024
Allow destruction of pre-1.0 object Open

Feature Feedback Good First Issue

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

onflow/cadence#3569 · Opened Sep 3, 2024
add `sliceKeys` method on dictionary types Open

Feature Feedback

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

onflow/cadence#3544 · Opened Aug 21, 2024
Getting/Borrowing a capability as a sibling interface-type of the orignally issued type Open

Feedback Improvement Question

onflow/cadence#3533 · 7 comments · 1 assignee · Opened Aug 15, 2024
Provide version-specific presets `ccf.EventsEncModeV0` and `ccf.EventsEncModeV1` for encoding events in CCF format Open

Go API Breaking Change Improvement Performance Technical Debt

onflow/cadence#3448 · 1 comment · 1 assignee · Opened Jul 3, 2024
FunctionExpressionInConditionError seems to be unnecessary after Purity check in conditions. Open

Feature Feedback Improvement

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

onflow/cadence#3434 · 1 comment · Opened Jun 20, 2024
[Cadence Testing Framework] Pretty Print Error Messages when running tests Open

Feedback Improvement

onflow/cadence#3403 · 4 comments · 1 reaction · 1 assignee · Opened Jun 6, 2024
Add Convenience Methods for Signed Data Structures Open

Feature Feedback

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

onflow/cadence#3388 · 4 comments · Opened Jun 3, 2024
Generics Open

Feature Feedback

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

onflow/cadence#3385 · 1 reaction · Opened May 31, 2024
Let new added contract be accessable in the same transaction after adding Open

Feature Feedback

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

onflow/cadence#3356 · Opened May 17, 2024
Add an unentitled way to identify if an account be controlled by account caps Open

Feature Feedback

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

onflow/cadence#3312 · 2 comments · Opened May 3, 2024
Support `Equatable` or `HashableStruct` subtypes Open

Feature Feedback

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

onflow/cadence#3246 · 6 comments · Opened Apr 16, 2024
Array and Dictionary mutation functions on value typed collections can't be used in a `view` context Open

Feedback Improvement

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

onflow/cadence#3222 · 4 comments · Opened Apr 5, 2024
Usage of RLP builtin Open

Feedback

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

onflow/cadence#3215 · 1 comment · Opened Apr 3, 2024
Allow call of `access(contract)` interface function with a default implementation from an implementing contract Open

Feature Feedback Improvement

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

onflow/cadence#3209 · 11 comments · Opened Apr 1, 2024
access(contract) and access(account) documentation Open

Documentation Feedback Good First Issue

Difficulty 2/5 1-3 hours Newbie friendliness 38/100

onflow/cadence#3207 · Opened Mar 31, 2024
Runtime needs to support importing Attachment and TypeValue of AttachmentType Open

Feature Technical Debt

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

onflow/cadence#3114 · Opened Feb 15, 2024
JSON-CDC needs to support decoding Attachment Open

Feature Technical Debt

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

onflow/cadence#3113 · Opened Feb 15, 2024
Errors caused by context cancellation or timeouts are marked "internal" Open

Bug Feedback Good First Issue

onflow/cadence#3032 · 2 comments · 1 assignee · Opened Jan 19, 2024

onflow/cadence

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