altcha_lib
Server-side Dart library for the ALTCHA Proof-of-Work v2 challenge system. Create, solve, and verify challenges using PBKDF2, SHA, Scrypt, or Argon2id.
What this package is like to depend on
Last release 25 days ago
30 Jul 2026
Too new to tell
only 2 release windows
Most releases are documented
notes for 3 of 5 stable releases
Nothing withdrawn
no release was ever pulled
4 months old
5 releases · first in 2026
5 releases in the last 12 months
see the full history below
Release timeline
5 releases · Apr 2026 to Jul 2026Releases
latest 5-
0.3.130 Jul 2026Nothing published for this version
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0.3.015 Apr 2026Nothing published for this version
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0.2.015 Apr 2026Release notes
Open source →- The PBKDF2 algorithm now uses
cryptofor improved performance - Added
adaptiveDeriveKeywith automatic algorithm detection
- The PBKDF2 algorithm now uses
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0.1.109 Apr 2026Release notes
Open source →- Upgraded
pointycastleto^4.0.0. - Removed
argon2dependency; Argon2id now uses pointycastle's built-in implementation. - Upgraded
lintsto^6.1.0.
- Upgraded
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0.1.008 Apr 2026Release notes
Open source →- Initial release.
createChallenge— create signed PoW v2 challenges with optional deterministic mode.solveChallenge— brute-force solve a challenge on the current isolate.solveChallengeIsolates— parallel solver using multiple Dart isolates.verifySolution— verify a client-submitted solution.verifyServerSignature— verify an ALTCHA Sentinel server signature payload.verifyFieldsHash— verify a hash of submitted form fields.- Algorithm support: PBKDF2/SHA-256, PBKDF2/SHA-384, PBKDF2/SHA-512, SHA-256, SHA-384, SHA-512, Scrypt, Argon2id.