Building “Policy‑Based” DeFi Wallets for Corporate Treasuries

Your treasury team is on the hunt for stablecoin yields and faster settlements. Meanwhile, your auditors are really focused on maintaining separation of duties, managing Travel Rule data, blocking sanctioned parties, and ensuring there's a strong approval process in place. On the other hand, your traders are really looking for gas-sponsored swaps and some solid protection against MEV. They also want to steer clear of any shadow IT stacks or those endless Permit2 allowances that just turn risk reviews into a total headache. Now that Pectra is live and kicking, and with EIP-7702 bringing smart contract features to existing EOAs, it feels like the tech is finally hitting its stride! But here’s the challenge: figuring out how to pull everything together without tripping over any policy or compliance issues. (coindesk.com).

• Missed quarter close: Navigating through manual sign-offs and trying to keep track of logs spread all over different wallets and Layer 2s can really slow things down. It’s frustrating, sometimes stretching the reconciliation process by several days just to get everything in line.
• Frozen liquidity: Recently, we've seen that counterparties are holding off on transactions until they have the validated Travel Rule data they need. A bunch of VASPs have started hitting the brakes on withdrawals unless they get a thumbs-up from the beneficiary first. This can really slow down vendor payments and even payroll. (notabene.id).
• Regulatory Landscape in 2026: The U.S. So, there's this new stablecoin framework called the GENIUS Act, and it’s setting up a licensing and reserve system for stablecoins. It’s set to kick in either 18 months after it gets signed--which happened on July 18, 2025--or 120 days after the final rules are released, which we expect to see within the next year. It's really important to get your controls lined up with this timeline. Trust me, waiting until the last minute can lead to a stressful scramble! (skadden.com).
• Execution alpha leakage: Just a heads up, the order flow on public mempools is still pretty vulnerable to things like frontrunning or sandwich attacks. If you're skipping the path that has revert protection, you might end up with your desk unknowingly taking on what I like to call a “DeFi tax.” It's kind of sneaky, right? You wouldn’t even know it’s happening! (collective.flashbots.net).
• Governance Dead Zones: When you’ve got unlimited token approvals--like what we see with Permit2--it can definitely make risk management teams a bit anxious. It really adds to the complexity if something goes south after a session gets compromised. It's like opening a door to issues you didn’t even know were lurking around! It's really important to have short-lived approvals that stick to cryptographic intent binding. That’s the main point we need to focus on! (api-docs.uniswap.org).

We design and provide a layered control system that really fits with treasury policy, rather than just sticking to traditional marketing protocols.

1) Smart-account baseline (EIP‑7702 + ERC‑4337)

Good news! You don’t have to ditch your current EOAs to take advantage of some cool smart-wallet features. Thanks to EIP-7702, you can enjoy things like batched operations, get help with fees, and have recovery options--all while sticking with what you already have. Pretty handy, right? This upgrade has been available since the Pectra update back on May 7, 2025. It’s really simplified things when it comes to migrating staff wallets and hardware keys, so you won’t need to worry about renumbering your addresses at all! Hey, take a look at this link from Coindesk for all the scoop on Ethereum's latest upgrade! It’s pretty interesting stuff if you're into crypto.

Hey there! So, with the ERC-4337 setup, you get to have a say in how you manage your spending and gas fees. It’s all about using bundlers and paymasters to make things easier for you. Plus, everything stays transparent with clear audit trails, so you can keep track of what's going on. Pretty cool, right? This standard has already handled millions of UserOperations and is all set to roll on the big Layer 2s. If you want to dive deeper, just check out Ethereum.org for more details!

2) Modular Policy Layer (ERC‑7579 or ERC‑6900)

• ERC‑7579: Picture this as a sleek, wallet-centered toolkit that keeps things simple. It's packed with features like validation, hooks, and execution modules, which makes setting up rate limits, role-based approvals, and session keys a breeze! Plus, it’s backed by some pretty reputable names in the ecosystem, including Safe, Biconomy, Pimlico, WalletConnect, and Rhinestone. That kind of support really says a lot! Take a look for more info: erc7579.com. You might find it interesting!
• ERC‑6900: This one's all about crafting those detailed permission graphs so you can have tight control over everything. It's totally ready for the big leagues! Just look at Alchemy's Modular Account v2 (MAv2) - it’s got audited implementations that really prove its worth. Plus, they've shared gas benchmarks, so you know what to expect in terms of costs. And let’s not forget, it even supports EIP‑7702 natively! Pretty impressive, right? Usually, we opt for 7579 when we need clear and easy-to-follow rules that we can always check back on. But when things get a bit more complicated, like with those tricky delegation trees that we just can’t bypass, we lean towards 6900 instead. If you’re looking to explore more, check out alchemy.com. It’s got a bunch of great info for you!

3) Key Management with MPC/TSS (Latency SLAs, Air-Gapped Options)

We rely on institutional MPC, such as the MPC-CMP lineage, to minimize the risks that come with using a single key. This approach also helps us stick to the “two-person rule” guidelines, so we keep things secure and compliant. The one-round signing design of MPC-CMP really speeds things up when it comes to latency, especially when you compare it to GG18, Lindell, or Doerner. Plus, it’s got some neat features like supporting air-gapped shares and automatic key refresh. This is super useful, especially when you’re dealing with policies that require partial cold workflows. If you're interested in diving deeper into this topic, you can check it out here. It's got some great insights!

If you’re diving into chains that use Schnorr, especially in Taproot scenarios, don’t worry--we’ve got you covered with FROST (RFC 9591)! It lets you do those 2-round threshold signatures, which means you can get the countersigning done pretty quickly, all while still maintaining those solid UC-style security features. Curious to learn more? Just take a look here!

4) Compliance guardrails baked into each transaction

• On-chain sanctions screening: Check out Chainalysis Oracle contracts on Ethereum and popular EVM Layer 2s to screen transactions before they're finalized. It’s a smart way to keep things in line! This is a really useful pre-transfer check, and it’s nice to know it's looked after by Chainalysis and available for everyone to access. Make sure to pair this with your current API-driven screening for an added layer of protection. (check it out here).
• Travel Rule pre-checks: Before you go ahead and release any funds, be sure to kick off your workflow integrations, like Notabene. It’s a good idea to double-check that you have the correct counterparty information in place! These days, it seems like whenever there's non-compliance, transactions or returns end up getting blocked. So, this step is becoming increasingly important! (learn more).
• FATF alignment: It’s important to set up your operations in a way that if your organization has any control or strong influence over a DeFi setup, you'll be ready to demonstrate that you meet your VASP-like responsibilities. Basically, this means you need to have good records and clear policies set up for stuff like risk assessments and Know Your Customer/Know Your Transaction (KYC/KYT) processes. (get the details here).

5) MEV-aware routing as the default

Okay, here’s the deal: to avoid that annoying issue of frontrunning and prevent those pesky reverted transactions, it’s a good idea to use private builders and Protect-style RPCs for your route approvals, swaps, and transfers. Trust me, it makes a difference! Also, don’t forget to include that same option in your internal relayers! Take a look at this: Flashbots Collective. It’s definitely worth your time! Hey there! Just a quick note for our operations teams: we can totally hook you up with private-mempool toggles and customize gas policies in your relayer console. This includes things like setting caps, choosing your EIP-1559 preferences, and managing sequencer behaviors on Layer 2s. Plus, everything comes with a handy audit trail for your peace of mind! If you want to dive deeper into this, check out the OpenZeppelin Docs right here: OpenZeppelin Docs. It’s packed with useful info!

1. "No-Infinite-Approvals" Allowance Policy (Permit2 with Expiration).

This basically means that when you request approvals, there’s a limit to how many you can get. So, instead of having endless approvals floating around, there’s a structured approach in place. The Permit2 comes in handy here, and it’ll have an expiration date. This way, we keep things organized and ensure that approvals are fresh and relevant. Alright, let's set some boundaries for using Uniswap's Permit2! We’re going to limit both the amount we can use and how long we can use it. And if there’s any unexpected change, we’ll go ahead and revoke it. Sound good? We connect quotes to specific intentions, and we always keep them updated to ensure those signature replay windows stay nice and snug. If you want to dive deeper into the details, just click here. Happy exploring!

7) Treasury-Grade SoD and Approvals with Safe-Style Modules

• Spending limits and roles: You can set daily limits for each asset and assign specific beneficiaries. This makes it a breeze to keep track of vendor payouts and manage card programs efficiently. Hey! If you want to dive into the details, just click here. You’ll find all the info you need!
• Delay/Circuit Breakers: Let’s add in some brief, policy-based delays for those unusual outflows. This will give the operations leads a chance to cancel if needed. If you're curious to find out more, just click here. It's got all the details you might need!
• Managing module lifecycle: We’ve got the flexibility to add or take away modules whenever needed, thanks to straightforward transactions. Plus, we’re diligent about tracking any policy changes so we can audit everything effectively. Discover more here.

1. Identity and Selective Disclosure (that’s Zero-Knowledge proofs combined with Verifiable Credentials). If you're looking for attestations but don’t want to hand over all your KYC info, you might want to check out W3C Verifiable Credentials 2. It's a great way to keep your info private while still getting what you need! 0, and you can add optional ZK proofs if you want! For instance, you might need to include something like “jurisdiction=US, accredited=yes” to get access to liquidity from counterparties that ask for that info. Take a look at this: (w3.org). It’s pretty interesting!
2. Integrating ERP and TMS for Smooth Closures.

• Link up your wallet events with your TMS or ERP system--like SAP S/4HANA or Oracle NetSuite--by using payment messages that follow the ISO 20022 format. This way, everything syncs smoothly! With this setup, you get automatic reconciliation and smooth exports to your SIEM. It really makes things easier! This is the point where you can really see the return on investment show up in your liquidity ladder and your Days Sales Outstanding (DSO) and Days Payable Outstanding (DPO) metrics.

Where Our Work Shows Up on Your KPI Sheet (GTM Metrics We Design For)

• Policy Coverage: This shows how much of the outgoing transactions are checked against the on-chain policies before they're carried out. We're shooting for a strong goal of at least 98% by the end of the first month.
• Approval Latency: This is where we check out the median time it takes from when a request is made to when it finally gets signed off. When it comes to our regular payouts, we're aiming to keep things quick--ideally around 12 minutes or less! Hey, just so you know, those high-value flows might hit a snag because of the delay modules.
• Failed Transaction Costs: Here, we’re looking at the costs associated with failed transactions for every $1 million that flows through. We're aiming for super low costs by using private routing. If you want to explore this topic a bit more, feel free to check it out here. It’s got some great info!
• MEV Leakage: We're looking to keep an eye on the slippage when it comes to trades happening in the public mempool, especially in relation to the TWAP. We're aiming to boost our performance by about 30 to 60 basis points on those big-ticket items. To track our progress, we'll be leaning on some solid baselines from arXiv.
  If you're looking for more details, you can check it out right here. Happy reading!
• Compliance Hit-Rate: This metric shows how well we're doing at spotting sanctioned or blocked counterparties before any agreements get signed. We're aiming to catch every single true positive by using oracle/API double-checks. If you're looking for more info, you can check it out here.
• AA Adoption: We keep an eye on how many transactions are happening through smart accounts versus the old-school EOAs. With this change, we’re seeing new opportunities for session keys, allowances, and revocation user experience (UX). These are becoming pretty standard as we keep ramping up our use of ERC-4337 and 7702. It's exciting to think about how these developments will shape the future! If you want to dive deeper into this topic, you can find more info here. Happy reading!

USDC Vendor Payments with CFO-Friendly Controls

Context

Alright, let’s break it down: We’re currently facing a situation involving the U.S. We've got our main office set up with several cost centers, and we're processing vendor payments every week. On top of everything else, we’ve got to deal with sanctions screening, follow the Travel Rule, and keep up with MEV protection. And we can’t forget about keeping our traders productive throughout the whole process!

• Account Architecture: So, the current EOAs have gotten a nice upgrade thanks to EIP-7702. Now, the execution part is all managed through these ERC-7579 modules, which help keep track of rate limits and allowlists. Pretty neat, right? If you want to dive deeper into this, you can check it out here. Enjoy exploring!
• Policy Set: So, we’ve set up some spending limits for each vendor--both daily and weekly. Plus, we’ve got specific folks in charge of managing that, all thanks to the spend limit module. If you're curious and want to know more, check out the details here.
• Before any transfer happens, we run it through a Chainalysis Oracle pre-check. This way, we can ensure everything’s legit and above board. If you’re looking for more details, you can check it out here. Hey there! Just a quick heads-up: we're using Notabene to handle the Travel Rule checks before flights. If we notice that anything's missing, we'll automatically block the transfer and let the AP queue know right away. Check it out here. So, here's the deal: we're automatically using a private mempool, which basically means we're cutting out those annoying costs that come with failed transactions. It's a smart way to keep things running smoothly! If you want to dive deeper into this topic, check it out here.
• Operational Guardrails: We’ve put in place some temporary Permit2 allowances that will expire based on the quote we provide. If anything changes with that quote, we’ll go ahead and revoke the allowance. Find the guide here.
• Business Result: We’ve successfully wrapped up all our vendor runs within the current “payment factory” cycles. Plus, we’ve gathered solid audit evidence that covers module settings, Oracle calls, and relayer policy logs.

Liquidity Provisioning (LP) and Desk Operations

Context

The Treasury is really honing in on low-volatility automated market makers (AMMs) right now. It's super important to avoid getting caught up in any negative vibes while still showing off your best work.

• Modules:
  Hey there! So, we've got this cool thing called the ERC‑6900 validation graph. It comes packed with desk-trader session keys, plus some neat features like caps, a pool allowlist, and TWAP‑bounded slippage. Pretty handy, right? Feel free to take a look at it here. So, there’s this Delay module that helps with governance and handles those out-of-the-ordinary outflows. Plus, there's a cancellation window for Risk, which is pretty handy. If you're looking for more info, just click here. You’ll find all the details you need!
• Relayer Policies: Imagine it like having gas caps, private routing, and specific actions tailored to each chain's sequencer. We've got everything well documented, and you can easily export this info if you need it for compliance reasons. Check it out here.
• Reporting: We're diving into some before-and-after analyses to see how private routing slippage has changed, and we'll be using the same pools and timestamps for everything. Recent studies show that the frequency of sandwiching is so high that it makes private defaults seem pretty worthwhile. Check out all the details right here. You won’t want to miss it!

Best Emerging Practices (Jan 2026)

You should totally consider using the EIP-7702 migration for your staff wallets! It’s super convenient because it lets you keep your address the same, but also gives you some awesome smart-account controls to customize things a bit.
(coindesk.com). If you're looking for straightforward policies that are easy to audit, stick with 7579. However, if you’re getting into the nitty-gritty of complex delegation across various teams or departments, you'll want to go with 6900 instead. Oh, and make sure to use the audited MAv2! It’ll help you save on gas fees and really speed up those reviews. Trust me, it makes a difference! (alchemy.com). Say goodbye to endless approval processes! With Permit2, you can keep things simple by using short expiry times and intent fingerprinting. Oh, and don’t forget to set up auto-revocation if there’s any change in the quote. Keep it smooth and efficient! (api-docs.uniswap.org). Make sure you keep your defenses in tip-top shape by doing both on-chain (oracle) and off-chain (API) sanctions checks. Trust me, logging both of these will definitely pay off in the long run! (go.chainalysis.com). Think of MEV as an expense you can cut back on. Start by choosing private builders by default, set up slippage policies to keep things in check, and make sure you have revert protection set up everywhere. (collective.flashbots.net). Alright, here’s the deal with the GENIUS Act clock: it’s time to start organizing your reserves, figuring out your custody situation, and checking in on any vendor dependencies you’ve got. Also, don’t forget to make sure your internal runbooks match up with that timeline - which is basically whichever comes first: 18 months or 120 days after the regulations drop. Let’s make sure we’re all on the same page! (pwc.com).

What We Build and Where to Click

• Wallet policy and smart-account engineering: We’re here to guide you in picking the best standards and creating custom modules that fit your needs. Plus, we’ll make sure everything is production-ready with detailed audits to keep things running smoothly. Take a look at our awesome smart contract development and dapp development services! We’d love to help you bring your ideas to life.
• Enterprise integration: Whether it’s connecting ERP or TMS systems, managing identity or KYC processes, keeping track with SIEM logging, or linking up custody and MPC setups, we’ve got everything you need sorted out. Check out what we've got going on with our blockchain integration and web3 development services. There’s a lot to explore, and we’d love for you to see how we can help you out!
• Making DeFi Work: We’re all about the nitty-gritty of DeFi--think paymasters, smooth private order flow, seamless multi-chain routing, and automating pools and payouts.
  If you’re looking for more details, check out our awesome DeFi development services and our cool cross-chain solutions. You might find just what you need!
• Risk and Audit: We’ve got you covered with clear guidelines for our policies, thorough reviews before we launch anything, and regular check-ins to make sure everything stays secure. Check out our security audit services to get all the info you need!
• Bridges and internal transfers: We set up safe and reliable connections between different Layer 2s and custodians. Hey there! If this sounds like something you'd want to dive into, take a look at our blockchain bridge development services. You'll find all the details there!
• Audience: We're focusing on folks in the U.S. If you’re a corporate treasurer or a treasury IT leader at a mid-sized to large company--especially one that manages operations across different entities and currencies--you’re definitely in the right group. This also involves procurement and risk managers who need to sign off on the wallet infrastructure.
• Keywords to include in your RFPs and steering committees: We're going to explore some pretty important topics, like integrating Treasury Management Systems (TMS), SAP S/4HANA, and Oracle NetSuite. We'll also touch on things like Payment Factory, In-House Banking, the Approval Matrix, Segregation of Duties (SoD), and the Three-Way Match process when it comes to getting vendors on board. We're diving into some really important topics like Liquidity Laddering, Cash Forecasting, FX Hedging, and Intercompany Netting. We're also taking a look at ISO 20022 mapping, getting that UAT sign-off, and making sure our RTO/RPO plans are solid. Plus, we're not leaving out the SIEM export, the Builder/Paymaster SLAs, and all those Change-control runbooks. Oh, and we’re making sure that we keep our Audit Trail immutability in check, too!

90-Day Implementation Blueprint (Typical)

• Days 0-15: Let's get started by diving into policy discovery and figuring out how to map those controls to code. Alright, so here's the deal: you need to choose between the 7579 and 6900 models. Next, check out who the paymaster sponsors are--that’s pretty important. After that, go ahead and set up those private-routing defaults. And don’t forget to pick your MPC topology while you’re at it. Good luck with that!
• Days 16-45: Alright, let's dive into building those modules! During this time, we’ll focus on creating spend limits, setting up allowlists, working on session keys, and figuring out some delays. It’s an exciting part of the process! Don't forget, you'll need to connect the Chainalysis Oracle and set up the Travel Rule webhook. Also, make sure to keep an eye on those Permit2 expirations! Hey, just a quick reminder to make sure you set up the relayer along with the gas and MEV policies. It's super important! (go.chainalysis.com).
• Days 46-70: Alright, so the plan now is to get integrated with the ERP and TMS systems. We’ll also tackle any reconciliation events that pop up and make sure to export everything over to the SIEM. Let’s get to it! Now's a great time to jump into some tabletop exercises. These can really help us get ready for stuff like policy breaches, losing key shares, and any hiccups with our counterparties.
• Days 71-90: Finally, let's kick off some parallel tests with actual vendors and start bumping up those caps little by little. Keep an eye on stuff like how long it takes to get approvals, the costs of reverting changes, and those little differences called slippage deltas. Hey, just a quick reminder to wrap up your runbooks and make sure you pass everything along!

ecosystem signals your stakeholders will recognize

• Account abstraction has officially made its way into the spotlight! The Ethereum Foundation's docs and the mainnet stats are showing a nice increase in the use of ERC-4337. On top of that, Pectra's EIP-7702 is rolling out some awesome native features for the existing EOAs. Check it out here. So, it looks like modular accounts are starting to settle on a couple of solid standards: ERC‑7579 and ERC‑6900. They've got solid, trustworthy setups that are perfect for businesses, plus they provide straightforward options for growth. If you want to dive deeper into it, you can check it out here.
• When it comes to compliance trends, there's a clear direction emerging: Virtual Asset Service Providers (VASPs) are really raising the bar. These days, making sure that Travel Rule data and sanctions checks are in place is becoming essential before any transactions go through. On top of that, policy-as-code is really helping to keep everything running smoothly, steering clear of those frustrating operational standstills. If you want to dive deeper into that, check out the details over at Coindesk. They’ve got some great insights!

Why 7Block Labs

At 7Block Labs, we’ve got the engineering know-how to tackle whatever you need. Whether it's diving into Solidity, working on policy modules, setting up AA infrastructure, integrating MPC, or handling ZK attestations, we’ve got you covered! Oh, and we really know our stuff when it comes to procurement! Whether it’s SLAs, runbooks, risk matrices, or those all-important auditable logs, we’ve got it covered. If you're searching for a build partner that can effortlessly connect with your DeFi traders and your Treasury Policy Committee, look no further--we're the team you've been waiting for! Take a look at our blockchain development services and our awesome cross-chain solutions. You might find just what you need!

Personalized CTA

Hey! If you’re in the U.S., Hey there, corporate treasurer! If you’re juggling between $25 million and $300 million in on-chain payables each month, this is definitely meant for you. Hey there! So, it’s time to get yourself prepped for those FY2026 audits, huh? You definitely want to be GENIUS-Act-ready. And let’s be honest, nobody likes waiting around, so keeping that approval latency under 15 minutes is key. Just remember to keep that Segregation of Duties (SoD) in check too! You’ve got this!

Hey there! Just drop us a quick reply with your payment schedule--are you going weekly or bi-weekly? Also, let us know which ERP you’re using, whether it’s SAP or NetSuite, and don’t forget to tell us your top three counterparties. Thanks! Let’s plan a 45-minute session to dive into the architecture of your policy-based wallet. We’ll map everything out and kick off the pilot for week one! Let’s make this happen!.

References

So, just a heads up! Ethereum Pectra and EIP-7702 are gearing up to launch on May 7, 2025. Mark your calendars! Hey, if you're looking for the latest scoop, head over to CoinDesk. They've got all the mainstream coverage and extra details you might want to check out! Hey there! Interested in ERC-4337? Check out the scoop on its adoption and the whole story behind account abstraction over at Ethereum.org. You'll find all the info you need! Check out the ERC‑7579 standard and its extensions registry right here: erc7579.com. It's worth a look! If you’re looking for some solid insights on implementing ERC‑6900 / MAv2 for enterprise, as well as audits and gas benchmarks with 7702 support, you should definitely take a look at Alchemy. They’ve got some great resources that can really help you out! Looking to get the lowdown on sanctions screening? Check out Chainalysis! They've got a super helpful tool for checking out addresses and networks, along with an API that makes everything even easier to use. Check out the link to get the latest info on go.chainalysis.com. You’ll find all the details you need! Hey folks! Just wanted to let you know that Notabene's report on the Travel Rule 2025 is officially out now. Plus, there's a handy summary from CoinDesk that dives into enforcement behavior. Definitely worth checking out! If you're curious to dive deeper, check out more details over at notabene.id. It's definitely worth a look! Hey there! Curious about who qualifies as a VASP in the DeFi world? The FATF has some guidelines that can really help clear things up for you. Take a look at this link: fatf-gafi.org. You might find some interesting stuff there! Check out Flashbots Protect! It’s got some awesome features like private mempool routing and revert protection. Plus, there are some neat relayer policy options to play around with. If you want to dive deeper into this, check out more details here: collective.flashbots.net. Hey there! If you're curious about MPC performance and security features (that's MPC‑CMP for the tech-savvy folks), or if you want to dive into the FROST RFC for Schnorr, you should definitely take a look at what Fireblocks has to offer. Just hop over to their blog here and get all the details!

• If you're thinking about setting up some spending limits, figuring out delay patterns, or just getting a handle on your module lifecycle, you've definitely got to check out the safe modules guide. It's super helpful! Find it at help.safe.global.
• And finally, if you’re looking for the scoop on how to navigate Uniswap’s Permit2--like how to handle approvals, expirations, and revocations--you can find all that info over at api-docs.uniswap.org. Happy exploring!

Services from 7Block Labs You Might Be Interested In

• Web3 Development Services
• Security Audit Services
• Blockchain Integration
• Blockchain Bridge Development
• Cross-Chain Solutions Development
• DApp Development
• DeFi Development Services
• Smart Contract Development
• Asset Tokenization