Composability Through Different Lenses: PTBs and EIP-7702

As decentralized applications become more sophisticated, executing multiple sequential on-chain actions remains a major user experience bottleneck. Both Ethereum and Sui are addressing this with new composability frameworks: Ethereum through EIP-7702 and Sui via Programmable Transaction Blocks (PTBs). These mechanisms allow users to bundle operations into single atomic transactions—improving efficiency, safety, and execution speed.

Key Ideas

Ethereum's EIP-7702 enables an externally owned account (EOA) to temporarily behave like a smart contract within one transaction, allowing complex logic and batching. However, integration with Ethereum's sequential model and EIP-4337 introduces extra developer complexity.
Sui’s PTBs are protocol-native and allow bundling up to 1,024 actions with parallel execution. The object-centric model ties logic to asset ownership, increasing throughput and reducing friction for advanced DeFi or gaming use cases.

Why It Matters?

Developers have the opportunity to use Sui’s PTBs to architect dApps with high composability and throughput by bundling parallel actions—ideal for DeFi platforms or dynamic game environments.

Founders now can build products on Sui that involve complex user flows or atomic multi-step operations—such as game mechanics, trading automations, or reputation-linked identity systems. These capabilities reduce friction and unlock real-time, interactive business models.