fix(genesis): reject non-canonical validator override ids

[Kewe63]

Summary

Fixes #322

This makes LocalDevAccountCreator validate overridePublicKeys validator IDs as canonical decimal integers before converting them with Number(...).

Previously, parseOverridePublicKeys converted the validator ID with Number(...) and only rejected NaN or values below 1. That allowed non-canonical numeric strings such as 1.5, 1e0, and 01 to be accepted.

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Changes

• Add explicit validator ID syntax validation before numeric conversion.
• Require overridePublicKeys IDs to match canonical positive decimal integer form.
• Keep the existing safe integer check after conversion.
• Add unit coverage for accepted and rejected overridePublicKeys IDs.

Accepted examples:

• 1:<key>
• 42:<key>

Rejected examples:

• 1.5:<key>
• 1e0:<key>
• 01:<key>
• -1:<key>
• NaN:<key>
• Infinity:<key>
• :<key>

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Why

validator_id is an identifier, not a loose numeric expression. Accepting alternate encodings can create ambiguous mappings:

• 1e0 resolves to 1
• 01 resolves to 1
• 1.5 is accepted as a non-integer Map key

Strict parsing catches malformed localdev/genesis configuration early and avoids confusing overridePublicKeys behavior.

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Tests

Regression test before the fix:

npx mocha -r ts-node/register ./tests/unit/localdev-account-creator.test.ts

Result before fix:

1 passing
1 failing

Failure:

AssertionError: 1.5 should be rejected: expected [Function] to throw an error

After the fix:

npx mocha -r ts-node/register ./tests/unit/localdev-account-creator.test.ts

Result:

2 passing

Unit test file sweep:

npx mocha -r ts-node/register ./tests/unit/*.test.ts

Result:

16 passing

Formatting:

npx prettier --config ./.prettierrc --check scripts/genesis/AccountCreator.ts tests/unit/localdev-account-creator.test.ts

Result:

All matched files use Prettier code style!

Lint:

npx eslint scripts/genesis/AccountCreator.ts tests/unit/localdev-account-creator.test.ts

Result:

passed

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Checklist

• Tests pass — 2/2 targeted, 16/16 full unit suite, confirmed failing before fix
• Prettier / ESLint clean
• Follows Conventional Commits
• Changes scoped to this fix only

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Risk & Impact

Low. The added syntax validation only rejects previously-ambiguous non-canonical numeric forms — canonical decimal integer IDs (0, 1, 42, etc.) are accepted exactly as before. Verified the regression test fails against the old parser and passes with the fix, confirming it exercises the actual ambiguity.

Type: 🐛 Bug fix
Fixes: #322