Forgot to post earlier, but here's last week's TWIL. Last week I learned about transaction types in Ethereum and @ZKsync. 

Ethereum ♦️ and ZKsync 🧬 use different transaction types to optimize for scalability, gas efficiency, and account abstraction. Let’s break it down! 👇

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+ gasPerPubData: Cost of L2 pubdata submitted to L1.
+ customSignature: For non-EOA accounts.
+ factoryDeps: Deployed smart contract bytecode.

🧬 Type 5 (0xff):
- Priority transactions for moving data from L1 → L2.

Ethereum and ZKsync Transaction Types
♦️🧬 Type 0 (Legacy):
- Used before EIP-1559.
- Still supported via Foundry’s --legacy flag.

♦️🧬 Type 1 (0x01):
- Introduced with EIP-2929.
- Adds an accessList for predeclaring addresses and storage keys.
- Saves gas on cross-contract calls by reducing state access costs.

♦️🧬 Type 2 (0x02):
- EIP-1559, introduced in the London Fork.
- Handles congestion with:
* maxPriorityFeePerGas: User-defined priority fee.
* maxFeePerGas: Total fee limit.
	(Notes: ZKsync supports Type 2 but currently ignores maxFee parameters.)

♦️🧬 Type 3 (0x03 - Blob Transactions):
- EIP-4844, introduced in the Dencun Fork.
- Scaling solution for rollups via blobs.
- Adds:


+ max_blob_fee_per_gas: Separate gas market for blob data.
+ blob_versioned_hashes: Tracks blobs associated with the transaction.

🔥 Blob fees are burned upfront, so failed transactions are not refundable.

That’s it for this week!

These transaction types highlight how ZKsync can still provide a similar experience to that on Ethereum, while providing more functionality with new txn types

Next time, I’ll cover Account Abstraction 😎

That’s it for this week!
These transaction types highlight how ZKsync can still provide a similar experience to that on Ethereum, while providing more functionality with new txn types

Next time, I’ll cover Account Abstraction 😎

ZKsync Transaction Types

🧬 Type 113 (0x71):
- Enables advanced features like account abstraction.
- Required for deploying smart contracts on ZKsync.
- Adds fields like: