adds serializer for Celo CIP 42 transactions

[aaronmgdr]

followup from #691

A custom Serializer supporting Celo CIP-42 (fee currency) Transactions.

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PR-Codex overview

Detailed summary

• Added serializer for Celo CIP-42 transactions.
• Imported celoSerializers in src/chains/index.ts.
• Added serializeTransaction function in src/chains/serializers/celo.ts.
• Added utility functions and types related to CIP-42 transactions in src/chains/serializers/celo.ts.
• Added tests for CIP-42 transaction serialization in src/chains/serializers/celo.test.ts.

The following files were skipped due to too many changes: src/chains/serializers/celo.test.ts

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Latest commit: 4648ec4

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[codecov]

Codecov Report

Merging #755 (e589a13) into main (ee93ca4) will decrease coverage by 5.06%.
The diff coverage is 39.89%.

❗ Current head e589a13 differs from pull request most recent head 4648ec4. Consider uploading reports for the commit 4648ec4 to get more accurate results

@@            Coverage Diff             @@
##             main     #755      +/-   ##
==========================================
- Coverage   99.78%   94.72%   -5.06%     
==========================================
  Files         255      253       -2     
  Lines       24460    24491      +31     
  Branches     2171     1865     -306     
==========================================
- Hits        24407    23199    -1208     
- Misses         50     1281    +1231     
- Partials        3       11       +8     

Impacted Files	Coverage Δ
src/chains/serializers/celo.ts	38.65% <38.65%> (ø)
src/chains/index.ts	91.36% <100.00%> (+0.25%)	⬆️

... and 50 files with indirect coverage changes

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Name	Status	Preview	Updated (UTC)
viem	🔄 Building (Inspect)		Jun 28, 2023 8:09pm

[jxom]

Looking great! Just need to get some coverage on these lines:

[aaronmgdr]

Looking great! Just need to get some coverage on these lines:

Ive added test for the lines that were showen as missing. but on CI its saying almost none of the file is covered. 🤔 This is odd since the lines it points to are the entire serializeTransaction and serializeTransactionCIP42 functions.

Also I create a PR on top of the first that creates some transaction argument assertion functions. I thought i might be useful to have these in one place rather than rewriting for each serializer.

https://github.com/clabs-co/viem/pull/2/files