Build system: nix

[tgunnoe]

(TODO: Add description & instructions)

[codecov-commenter]

Codecov Report

Merging #473 (ab770b0) into develop (cc4699f) will decrease coverage by 1.51%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #473      +/-   ##
===========================================
- Coverage    73.61%   72.10%   -1.52%     
===========================================
  Files           59       59              
  Lines         1789     1828      +39     
  Branches       272      281       +9     
===========================================
+ Hits          1317     1318       +1     
- Misses         472      510      +38     

Flag	Coverage Δ
contracts	86.72% <ø> (-0.47%)	:arrow_down:
core-utils	53.79% <ø> (ø)
data-transport-layer	29.25% <ø> (-3.66%)	:arrow_down:
message-relayer	83.17% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../l1-ingestion/handlers/sequencer-batch-appended.ts	12.21% <0.00%> (-3.10%)	:arrow_down:
...ages/contracts/contracts/L2/predeploys/OVM_ETH.sol	100.00% <0.00%> (ø)
.../contracts/contracts/standards/L2StandardERC20.sol	88.88% <0.00%> (ø)
...contracts/contracts/libraries/utils/Lib_Buffer.sol	92.85% <0.00%> (ø)
...ontracts/contracts/L1/verification/BondManager.sol	100.00% <0.00%> (ø)
...ontracts/contracts/libraries/rlp/Lib_RLPReader.sol	96.87% <0.00%> (ø)
...ontracts/contracts/libraries/rlp/Lib_RLPWriter.sol	93.84% <0.00%> (ø)
...ntracts/contracts/chugsplash/L1ChugSplashProxy.sol	100.00% <0.00%> (ø)
...ntracts/contracts/libraries/codec/Lib_OVMCodec.sol	55.55% <0.00%> (ø)
...ntracts/contracts/standards/AddressAliasHelper.sol	100.00% <0.00%> (ø)
... and 16 more

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