Exploring @Aptos_Network 
Parallel x Sequential Execution:
Aptos introduces BlockSTM, enhancing parallel tx execution without the need for initiators to detail interaction accounts. It strikes a balance between efficiency & system resourcefulness but predicting the nature of execution is a challenge.
Fee Markets in Aptos: 
Transactions are structured with base gas fees based on three parameters:
- Instruction: considering the number & complexity of executed instructions.
- Storage: based on bytes read/written.
- Payload: fees increase with more transaction bytes.
Decreasing Gas Fees: 
- 2022: A swap_exact_input transaction took 8611 gas units.
- May 2023: The requirement dropped to 56 gas units.
- Sept 2023: Only 15 gas units were needed.
This showcases a trend of decreasing gas units over time.
Transaction Finality:
By leveraging a variation of the HotStuff consensus protocol, Aptos offers deterministic finality, ensuring once a transaction is committed, it’s irreversible. This instant finality improves user experience and trust, especially in high-stakes txs.
Aptos PoS:
Resilient network with ~100 nodes. While it currently supports a singular client for focused development, its consensus stands out with AptosBFT—a variant of HotStuff, utilizing DAG & QC.
Key metric: Txs finalize in <5s, exemplifying deterministic finality.
Stablecoins: 
Aptos notably lacks native stablecoin support. Instead, it turns to Layerzero for wrapped stablecoins. This does offers versatility but also introduces trust complexities: Aptos users must rely on Layerzero’s security and reserve integrity when transacting.
Amid payment challenges, Aptos offers tailored solutions using Move with fast confirmations, balancing user & developer needs.
As the landscape evolves, ecosystems like Aptos highlight the potential of next-gen L1s in redefining payment infrastructures.
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