Add support for Optimism gas costs (bedrock & ecotone)

[cgewecke]

• Adds logic to synthesize optimism gas costs locally
• Adds stubs for Arbitrum gas costs (impl in separate PR)
• Misc table appearance imp.
• Moves viem to dependencies for tx serialization
• Upgrades viem
• Change ts comp target to ES2021 (same as Hardhat)
• Remove unused truffle5 dep

Checked output vs some tx on Etherscan - variance is < 1%

Call type	PR L1	Etherscan L1	% Total Tx Cost Diff
small fn	2324	2340	0.72%
large fn	21144	21176	0.15%
deployment	47948	47980	0.06%

NOTE: There's a weird thing with the hardhat projects template where testFiles paths resolve incorrectly on linux. This doesn't happen on MacOS though... e.g

/home/circleci/project/test/projects/options/test/variableCosts.ts

TODO

• decimal execution gas prices
• unit test and validate against txs from optimistic-scan
• handle undefined baseFee, blobBaseFee
  • will wait till ecotone is testable
• use viem to serialize tx
  • https://github.com/ethereum-optimism/optimism/issues/9293#issuecomment-1920305417
• getting small underestimate for L1GasUsed....why? Should be overestimate?
• upgrade to viem2 .b/c can't serialize EIP1559 fields... hardhat just released this
  • https://github.com/NomicFoundation/hardhat/releases/tag/%40nomicfoundation%2Fhardhat-viem%402.0.0

[cgewecke]

Methods

	Min	Max	L2 Avg (Exec)	L1 Avg (Data)	Calls	chf avg
VariableCosts
addToMap	45,059	135,939	101,859	2,739	4	0.24
methodThatThrows	-	-	43,727	2,064	1	0.18
otherContractMethod	-	-	49,939	1,932	1	0.17
removeFromMap	25,069	36,253	29,263	2,598	4	0.23
sendPayment	-	-	33,312	2,456	1	0.22
transferPayment	-	-	33,302	2,456	1	0.22
Wallet
sendPayment	-	-	33,268	2,456	1	0.22
transferPayment	-	-	33,257	2,456	1	0.22

Deployments

	Min	Max	L2 Avg (Exec)	L1 Avg (Data)	Block %	chf avg
VariableCosts	-	-	753,821	49,848	2.5 %	4.41
Wallet	-	-	213,658	13,420	0.7 %	1.19

Solidity and Network Config

Option	Settings
Solidity: version	0.8.24
Solidity: optimized	false
Solidity: runs	200
Solidity: viaIR	false
Block Limit	30,000,000
L1 Base Fee	46 gwei
L2 Gas Price	0.00332 gwei
Token Price	2806.78 chf/eth
Network	optimism

[cgewecke]