According to Woofun AI, stablecoins have largely matured in their settlement capabilities within crypto-native scenarios, yet truly reaching offline merchant checkout counters still faces a massive "consumer layer" gap, and the most viable path at present is to achieve this leap by relying on payment card networks.
When a user deposits 2,000 USDC into a wallet on the Base chain and walks into a restaurant, the asset genuinely exists, but the restaurant's point-of-sale terminal has no way of perceiving it. This disconnect reveals the fundamental difference between on-chain transfers and offline payments: the former only requires gas fees, block confirmations, and handling chain reorganizations and other technical steps, while the latter involves the ISO 8583 standard, Apple Pay or Google Pay, and other complex processes. Merchant checkout systems are built on strict communication messaging protocols, POS software, acquirer partnerships, and network rulebooks. When a user taps a card or phone to pay, the system must return an authorization result within an extremely short window. The checkout counter does not need to understand, and does not want to understand, gas fee fluctuations or chain reorganization risks, and the vast majority of merchants do not even need to grasp these concepts. Cardholders likewise do not want a payment experience filled with cryptocurrency complexity. The core value of Apple Pay and Google Pay lies precisely in encapsulating bank card credentials into a familiar, fast, and seamless payment method.
Settlement is about back-end fund clearing, while consumption encompasses trust, transaction rules, authorization, messaging communication, and commercial guarantees, ensuring merchants are willing to hand over goods before fund clearing is completed. Over the past five years, stablecoins have become reliable settlement infrastructure across multiple transaction scenarios. In areas such as DeFi liquidity, corporate treasury management, and cross-border remittances, stablecoins continue to carry large transaction volumes, operate 24/7, settle within seconds, and cost less than a cent per transfer. In crypto-native and cross-border fund flow scenarios, their settlement capability is almost fully realized. However, paying a merchant is far more complex.
A single checkout counter transaction requires payment credentials, an authorization engine, compliance checks, risk control and fraud prevention, chargeback rules, and foreign exchange conversion, all cleared through card networks. Transfers between wallet addresses require none of these steps, which leads industry narratives to often conflate settlement with consumption. A smart contract can move tokens from Alice to Bob in two seconds, but that does not mean checkout payments become simple. Settlement answers whether value was successfully transferred, while consumption addresses whether a merchant can approve a sale through existing systems, deliver goods, handle fraud disputes, reconcile turnover, and complete collection. Merchant acceptance constitutes the biggest bottleneck today. While blockchain can enable permissionless global fund transfers, it cannot force merchants to accept cryptocurrency. Merchants are willing to integrate Visa (V.US) and MasterCard (MA.US) because these card networks are deeply embedded in checkout hardware, e-commerce checkout software, acquiring partnerships, accounting processes, and user habits. When retailers evaluate payment methods, they consider the comprehensive cost of the entire business chain, and transaction fees are only one item. Switching payment collection methods involves checkout device modifications, store training, end-of-day reconciliation scripts, tax software, and acquirer liability agreements, creating extremely strong path dependence.
Direct stablecoin payments face three major challenges: retailers are unwilling to add a separate QR code scanning device next to existing terminals; finance teams want funds deposited into bank accounts via ACH or wire transfer on a fixed cycle; and merchants rely on card organization chargeback mechanisms to handle fraud and payment errors, whereas on-chain transfers are irreversible once sent. This creates a contradiction: the USDC in users' hands has liquidity but cannot be directly spent offline. Rather than persuading tens of millions of merchants to overhaul software and hardware all at once, it is better to let on-chain assets directly reuse the payment systems merchants already have. Converting token balances into complete card payments requires eight major modules working in coordination, and the entire process must be completed within an extremely short time. The first is the wallet and asset balance, serving as the vehicle for storing user assets, which can be a self-custodial mobile wallet, a browser extension, or a licensed exchange account. The second is the stablecoin funding layer, which through APIs, protocols, or smart contracts locks, reserves, or deducts tokens upon receiving a payment authorization request. The third is program infrastructure, namely the consumer layer, which serves as the core engine receiving card authorization messages, verifying balances in real time, evaluating risk control policies, and delivering risk decisions. The fourth is the payment processor, responsible for handling ISO 8583 messages, PIN verification, and routing authorization information between card organizations and program management systems. The fifth is the issuer and network access, where a licensed issuing bank or principal member institution provides the legal qualifications and card organization permissions for issuing payment credentials. The sixth is the card network, such as MasterCard (MA.US), which routes authorization and clearing messages between issuers and acquirers. The seventh is the acquirer and merchant processor, serving as the merchant-side partner that processes transactions, manages terminals, and settles fiat funds to merchants. Finally, the eighth is the merchant checkout end, including terminals, card readers, or online checkout pages, where users present payment credentials to complete payment. This article focuses on the third layer, the consumer layer responsible for bridging wallet balances and payment network standards. Without this layer, on-chain dollars cannot connect to everyday commerce.
Data compiled by Woofun AI shows that Immersve is a typical case filling this gap. The company has built B2B card infrastructure based on MasterCard (MA.US) issuing capabilities, enabling wallets, exchanges, and fintech companies to launch card credentials funded by crypto asset balances without having to independently build issuing, authorization, compliance, and clearing systems. Self-developed card programs require card organization membership qualifications, integration with issuers and processors, establishment of transaction monitoring, dispute processes, and multi-currency fund management capabilities, which for most teams have an extremely low return on investment. Immersve operates the entire card program in the back end, end users continue operating within their original apps, and wallets or fintech companies can launch their own branded cards and generate ongoing transaction flow. Whether in the custodial or self-custodial track, this logic is being implemented. MetaMask Card brings the consumer layer into mainstream self-custodial wallets, with users operating entirely within the wallet while the underlying infrastructure converts on-chain asset balances into card network transactions. Custodial exchange platforms such as Binance, Bitget, and KuCoin also have the same need. Although user balances are stored on platform ledgers rather than self-custodial wallets, the core payment challenge is identical: how to make this balance recognizable and spendable by merchants already connected to bank cards. Immersve is not the only player. Rain, Baanx, Marqeta (MQ.US), Bridge, Gnosis Pay, and other projects are also solving similar problems, though they differ in custodial models, issuing methods, program management, settlement, and distribution strategies. This signals that an independent infrastructure market is forming between on-chain asset balances and merchant payment collection systems.
A typical stablecoin bank card consumption flow is as follows: a user uses a virtual card in Apple Pay or Google Pay to complete a tap payment at a contactless terminal. The checkout terminal sends a standard card authorization request through the acquirer to the card network, such as MasterCard (MA.US). MasterCard (MA.US) identifies the card BIN number and forwards the message to the program processor and consumer infrastructure. The platform verifies account status, runs risk models and risk scoring, and confirms that the associated wallet or account holds sufficient stablecoins and foreign exchange buffer funds. Once the transaction is approved, the authorization code is transmitted back through MasterCard (MA.US) to the checkout terminal, and the user and store clerk immediately see payment success. In the back end, based on program mechanisms, the user's stablecoin balance is deducted, locked, or reserved. Within the regular clearing cycle, fund disbursement and settlement are completed among the program, processor, issuer, card organization, stablecoin service provider, and acquirer. The merchant sees an ordinary card transaction and receives local currency settlement funds through their existing payment collection channels, never touching digital assets throughout the process, with no need to manage keys and no need to alter corporate accounting processes. The closer the front-end experience is to Apple Pay, the less users need to understand the underlying source of funds, and merchants continue using the bank card payment system.
Custodial and self-custodial models differ significantly in technical implementation. In the custodial model, the exchange or custodial wallet holds user balances in its own database. When an authorization request is received, the consumer infrastructure calls the platform API to verify funds, and the platform typically locks or deducts the balance internally, after which the program's settlement system assumes the fund obligations corresponding to the card organization. The self-custodial model is more difficult, with users holding their own private keys and stablecoins stored on-chain. During the checkout authorization window, there is no time to wait for a brand-new on-chain transaction confirmation, because block times, network latency, and gas fluctuations cannot meet payment timeliness requirements. Therefore, the program must approve the card transaction before the on-chain fund transfer is completed, which requires pre-configuring smart contract authorizations, fund reserves, delegated spending permissions, or liquidity arrangements, with the program advancing funds first and completing on-chain settlement afterward. Different projects have different implementation approaches, but supporting both models on the same authorization layer ensures that cardholders receive a consistent payment experience regardless of where their assets are stored. What appears to be unremarkable underlying capability is in fact the true moat.
Stablecoin payment promotion often emphasizes transfer speed and low gas fees, but the real difficulty lies in hidden costs such as compliance, risk control, foreign exchange, and reconciling three sets of ledgers. Compliance and sanctions screening covers KYC, anti-money laundering, sanctions list controls, transaction monitoring, and wallet risk screening, spanning onboarding, continuous monitoring, and transaction authorization across the entire process. Fraud risk control requires real-time scoring of card-not-present transaction risk, abnormal cross-location transactions, high-frequency transactions, and credential theft. Regarding disputes and chargebacks, card networks allow consumers to reverse unauthorized transactions or unfulfilled orders, and the consumer layer must reconcile irreversible on-chain funds with a dispute system that supports rollbacks. Foreign exchange and treasury management require that when USD stablecoins are spent in Paris or Tokyo, they can be converted into euros or yen in real time, and the program must reserve foreign exchange buffers for each authorization, manage spreads, liquidity, and slippage, or otherwise bear losses. Additionally, three sets of ledger reconciliations must be completed daily across on-chain records, processor transaction statements, and card organization clearing files. Issuers and program managers are accountable to card organizations and regulators for every card under the program, and this responsibility is not reduced because the funds come from the blockchain. Card organization rules govern authorization, disputes, and program access, and the rules continue to change. Completing three sets of ledger reconciliations every night is the truly thorny work, and it is also the root of why the payments business is so hard to run.
Although stablecoins can quickly gain broad merchant support through card distribution channels, they still face many unresolved issues. Dependence on card networks means programs must comply with card organization rules and face fee adjustments and policy changes at any time. Once card organizations restrict certain digital asset structures, service providers need to adjust quickly. Regulatory uncertainty is reflected in the divergent policy directions across different regions regarding issuing, stablecoin reserves, user disclosure, and cross-border transfer regulations. User spending habits remain unclear, and it is uncertain whether users will treat stablecoins as an everyday spending account or use them only for specific scenarios such as travel, transaction settlements, freelancer remittances, or inflation-resistant savings. On the technical risk side, self-custodial funds depend on smart contract security, network availability, and stable gas costs, and network congestion or contract vulnerabilities can interrupt payments. Direct competition comes from the possibility that large merchants or acquirers may in the future build cardless stablecoin checkout systems for large-value B2B or e-commerce payments. Achieving stablecoin consumption through bank cards does not eliminate the costs of the card system itself. Interchange fees, card organization fees, processing fees, program operating fees, compliance costs, and dispute liability all remain. Pure on-chain stablecoin checkout has lower underlying channel costs, but only if merchants are willing to bear new system integration, reconciliation, refund logic, accounting recognition, and operational risks. For many merchants, a lower channel unit price does not equal a lower overall cost. Once enterprises are forced to overhaul business processes, the comprehensive cost actually rises. Bank cards solve the merchant acceptance problem but also inherit their rules and constraints.
Wallets control the user-side entry point, merchants control the checkout scenario, card organizations control payment acceptance capability and brand trust, and issuers and program managers hold licenses, BIN number permissions, and card organization partnership resources. To achieve tap-to-pay on a phone, these four parties must work in coordination. Expecting merchants to completely abandon existing terminals, acquiring processes, and accounting systems to directly accept on-chain transfers is unrealistic. Stablecoins have solved the settlement problem, while the consumption side must handle a series of challenges including authorization, compliance, merchant onboarding, and checkout experience. If stablecoins are to become a mainstream payment tool, the winning architecture will not require all participants to overhaul everything at once. Users hold dollar tokens, wallets provide the interaction interface, card networks retain merchant payment collection capability, merchants continue to receive regular fiat settlement, and the consumer layer bridges the conversion between these two systems. Settlement gives stablecoins their utility value, and consumption will determine whether stablecoins can enter everyday life.
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