[AhmadReza6610]

Fixes #471

randomUtxo, randomToken and randomNFT derived txids, token categories and NFT commitments from randomInt(), which has only 10,000 values, so tests with many random UTXOs or tokens got shared outpoints and categories.

As proposed in the issue, they now use crypto.getRandomValues: 32 bytes for txids and categories, 4 bytes for NFT commitments (the same length as before). Satoshi and token amounts still use randomInt(). The API is unchanged and defaults still override every field. sha256 and bigIntToVmNumber are no longer used in utils.ts, so their imports are removed.

Tests (packages/cashscript/test/util.test.ts, new random test helpers block):

• 2,000 random UTXOs have distinct outpoints, and 2,000 random tokens and NFTs have distinct categories (with the old helpers these fail every run).
• Txids and categories are 32-byte hex, and commitments are 4-byte hex.
• Defaults still override the random fields.

I checked that the three uniqueness tests fail on master and pass with this change. The cashscript package tests and lint pass.

The pr-stats bot notes there's no release-notes entry. Since v0.14.0 is already released, I didn't want to guess the next version heading. Happy to add a line under whichever heading you prefer, e.g. ":bug: Fix bug where randomUtxo(), randomToken() and randomNFT() could return colliding txids, token categories and NFT commitments."

[vercel]

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[github-actions]

Pull request stats

	Source	Tests	Total	Net	Share
SDK (cashscript)	+8 −6	+41 −0	+49 −6	+43	100%
Total	+8 −6	+41 −0	+49 −6	+43	100%

Reviewable churn: 55 lines (net +43), version bumps and generated files excluded.
Test lines per line of source: 2.93.
Comments: 2 of 7 added source lines, 29%.

Package source changed without an update to website/docs/releases/release-notes.md.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.25%. Comparing base (5f0eaff) to head (250e1d5).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #476   +/-   ##
=======================================
  Coverage   89.25%   89.25%           
=======================================
  Files          61       61           
  Lines        5081     5082    +1     
  Branches      950      950           
=======================================
+ Hits         4535     4536    +1     
  Misses        421      421           
  Partials      125      125           

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