Sonic Labs published a new technical explainer on August 27, 2026, detailing how developers can use its recently upgraded transaction bundling system to reduce a complex, multi-step DeFi operation to a single wallet signature. The post, titled "Why Sign Twice?", is the second in a series that began with "Bundled By Default." It builds on the network's V2.2 release and the Brio hard-fork that enabled it, and describes a design pattern the team calls the delegate account model.

What the Delegate Pattern Does

In most DeFi applications today, a user completing a five-step workflow, such as approving a token, executing a swap, making a deposit, opening a position, and confirming a result, must approve each step individually. On Sonic V2.2, developers can instead structure that entire sequence as follows: the application generates a temporary, single-use key pair called a delegate account; the user signs once to fund that account with the necessary assets; the delegate then carries out each step automatically; and the results land back in the user's wallet before the temporary key is discarded. The whole sequence is wrapped in an atomic bundle, meaning either every step completes or none of them do.

The cryptographic binding is a meaningful detail here. The user's single signature is tied to a hash of the full execution plan, covering every transaction, every parameter, and their order. Changing any part of the plan after signing invalidates the bundle entirely. Sonic Labs described it plainly: "The execution plan specifies every transaction in the bundle, in order, with their exact parameters."

The underlying bundling system supports two execution modes. AllOf requires every transaction in the bundle to succeed, or the whole set rolls back. OneOf runs transactions in sequence and stops at the first success, which is useful for routing through fallback liquidity sources. These modes can be nested, allowing developers to build more conditional logic into a single bundle. Four new RPC methods support the feature: sonic_prepareBundle, sonic_submitBundle, sonic_getBundleInfo, and sonic_estimateGasForTransactions. The system works with standard EOA wallets (externally owned accounts, the kind controlled by tools like MetaMask, Ledger, Trezor, and similar software or hardware wallets) without requiring any smart contract wallet upgrades.

It is worth being precise about what V2.2 actually enforces. The delegate pattern is an application-level design choice, not a protocol mandate. Developers decide how many signatures to request; V2.2 makes single-signature flows possible, but nothing in the protocol automatically reduces signatures for users. Signing once is a decision made by the developer building the application, not a behavior the protocol imposes.

One limitation is worth noting. The delegate pattern does not work for DeFi positions where ownership is assigned to msg.sender, a Solidity variable that records which address initiated a transaction. Lending positions, liquidity provider shares, and staking entries often rely on this mechanism. Protocols would need to add explicit "on behalf of" support to their contracts before the delegate approach would work for those use cases. Standard multi-signature bundles remain the alternative in those situations.

Relevant Context: Ethereum Is Solving the Same Problem Differently

Sonic's approach is not the only protocol-level answer to signature fatigue. Ethereum's Pectra hard-fork, activated in May 2025, introduced EIP-7702, which lets standard EOA wallets temporarily execute smart contract logic, enabling transaction batching at the Ethereum layer. More than 11,000 EIP-7702 authorizations were recorded on Ethereum mainnet within the first week of Pectra going live. By 2026, industry estimates put global smart wallet deployment at over 200 million across all ecosystems, a figure that underscores how broadly account abstraction solutions have scaled. Sonic's bundled transaction architecture represents a parallel, protocol-native solution to the same friction point rather than a unique one.

The friction is real and measurable. Research from Formo.so published in 2026 found that 68% of DeFi users abandon the process between wallet connection and their first completed action, precisely the window where repeated signature prompts do the most damage.

Why This Matters Outside the United States

For users in South Asia and sub-Saharan Africa, where the vast majority of crypto activity happens on mid-range or lower-tier Android handsets, repeated wallet approval popups are not merely annoying. They consume processing cycles, disrupt flow on smaller screens, and force context-switching in ways that compound friction for users working with limited device resources.

Africa's mobile money sector processed roughly 108 billion transactions worth $1.68 trillion in 2024. Users in M-Pesa-heavy markets across Kenya, Tanzania, and Ghana, and UPI-adjacent markets in India, Pakistan, and Bangladesh, are already comfortable with frictionless digital payments. The gap between that comfort level and DeFi participation is largely a UX gap.

The delegate pattern gains additional relevance in these markets when considered alongside Sonic's Sponsored Transactions feature, through which applications can cover gas fees on behalf of users, with wallets displaying "0 gwei" rather than an unpredictable cost estimate. As Sonic Labs detailed in its "Fast Was the Floor" blog post, for new users in regions where gas cost confusion and unpredictable fees are major drop-off points, the combination of invisible gas and a single approval screen lowers the onboarding bar materially. Whether these capabilities help close the participation gap depends entirely on whether developers building local wallets, exchange frontends, and aggregators in those markets choose to implement them. The protocol makes the patterns available; adoption is a separate question.

The Ecosystem Caveat

Sonic launched in December 2024 as the rebranded Fantom Opera network. Its DeFi TVL climbed from roughly $123 million at launch to a peak near $971 million in March 2025 before falling sharply. As of late August 2026, TVL sits at approximately $16 to $20 million, a decline of roughly 98% from peak. The S token trades near $0.022, down about 97% from its January 2025 all-time high, with a market cap around $111.5 million and daily chain fees of roughly $185.

The network also completed a leadership overhaul in June 2026, with Andre Cronje, Michael Kong, and David Richardson departing the board. Incoming CEO Matt Visser and incoming COO Kosta Kourkoumelis have framed the rebuild in deliberately modest terms. Visser stated: "I am not going to promise an instant turnaround. My goal is to make Sonic 1% better every day and let that effect compound." The technical improvements in V2.2 are genuine. The question for developers evaluating the chain is whether the ecosystem has enough liquidity and momentum to make building on it worthwhile in the near term.