DOLLA$ — Coinbase Onramp Production Reassessment

Why production graduation is the right outcome

• The sandbox proves the integration works. The OnchainKit <FundCard> flow is wired into both the creator-follow and tier-upgrade surfaces. Real Onramp transactions inside the sandbox limits have validated the end-to-end path: card / Apple Pay / bank → USDC into the user's own Coinbase Smart Wallet → spend permission → on-chain charge. There is no integration risk left to validate.
• The $5 per-transaction sandbox cap sits below our standard product price points. Our Verified tier is $4.99/month and our Sovereign tier is $4.99/week — both clear the cap with no headroom for any rounding or processing variance, and a Sovereign user wanting to fund 4 weeks at once ($19.96) cannot do so at all. Production access removes a constraint we run into on the very first user-facing transaction.
• The 25-transaction lifetime cap sits below a single production user's first-month footprint. A user who follows even a handful of creators and upgrades to a tier exhausts the cap immediately. We cannot run the production service against this ceiling — it is by design a development-only envelope.
• The rest of the Coinbase stack is already in production at DOLLA. Smart Wallet, CDP Server Wallets (10 sharded), OnchainKit, Coinbase Paymaster, @base-org/account, and Sign-in-with-Smart-Wallet are all live in production use. Onramp is the last consumer-facing piece needed to make the experience seamless for the ~95% of users who don't yet hold USDC.
• DOLLA never custodies user funds. Every Onramp purchase delivers USDC to the buyer's own Coinbase Smart Wallet — never to a DOLLA-controlled wallet. The compliance surface area Coinbase Onramp is exposed to via DOLLA is materially smaller than for a typical custodial integration.

DOLLA$ is a consumer social-payments app live at justadolla.com. It is a venture of Kingdom Portfolios LLC, a private US-incorporated entity. The product itself is built for everyone — values-aligned creators across faith traditions, geographies, and walks of life — and the parent company's mission is operationalized through the platform's revenue commitments rather than through any gating of who can use it.

The core mechanics in three lines

• Follow = $1/month. A follower signs one Spend Permission against the creator's wallet. USDC settles wallet-to-wallet on Base. The creator keeps 100%.
• DOLLA's revenue comes from optional premium tiers — Verified at $4.99/month and Sovereign at $4.99/week — for users who want enhanced UX. Creator transactions are 0%.
• The majority of premium-tier revenue is committed to charitable distribution, board-governed at the parent-company level and routed through partnered 501(c)(3) vehicles.

Why a wallet under it

The point isn't crypto — the point is self-custody. When a follower pays a creator, the dollar moves from one user-owned wallet to another via a smart-contract spend permission the user explicitly signed. There is no DOLLA-controlled bank account in the middle. There is no "we'll pay you out next month." Settlement is sub-second and irrevocable, and DOLLA cannot legally or technically intercept the funds.

Coinbase Onramp is embedded inside DOLLA's upgrade and follow flows via the OnchainKit <FundCard> component. It is invoked in exactly one situation: a user wants to make a payment, and they do not yet hold sufficient USDC in their Coinbase Smart Wallet to complete it. The Onramp UI lets them top up with card, Apple Pay, or bank — the funds land in their own Smart Wallet — and the original payment then proceeds.

Where the funds go after Onramp

• For creator follows: the spend permission allows DOLLA-managed Server Wallets to pull up to $1 USDC per 30-day window from the user's wallet, transferring directly to the creator's wallet via the on-chain SpendPermissionManager contract. DOLLA's wallets never custody the funds.
• For premium tier subscriptions ($4.99/mo Verified, $4.99/wk Sovereign): the spend permission allows the same Server Wallet to pull the tier price per period to the DOLLA corporate wallet. This is a standard merchant-to-customer recurring relationship — the user is paying the operator for a software service.
• For one-time donations from Sovereign-tier users: permission is signed for the explicit donation amount, transferred wallet-to-wallet to the recipient. DOLLA is never an intermediate holder.

The wallet model

• Every user wallet is a Coinbase Smart Wallet (an ERC-4337 Smart Account issued by Coinbase) on Base mainnet.
• The wallet is passkey-secured via WebAuthn — Touch ID, Face ID, Windows Hello, or hardware-backed authentication on the user's own device. No seed phrase. No private key transmitted. No DOLLA possession of any cryptographic material that controls user funds.
• Wallets are portable — the user can detach DOLLA and continue using the same Smart Wallet on any other Coinbase-ecosystem app, on coinbase.com, or via Smart Wallet's standalone interface.

The payment model

DOLLA uses Base's native EIP-style Spend Permissions via the SpendPermissionManager contract. When a user follows a creator for $1/mo:

1. The user's Smart Wallet signs one permission: "Allow this DOLLA-managed Server Wallet to pull up to $1 USDC from me, per 30-day period, until I revoke."
2. The signature is stored on-chain in SpendPermissionManager.
3. On the recurring billing day, our cron worker invokes charge() against that permission. The contract verifies the permission is valid, the period limit isn't exceeded, then transfers USDC directly from the user's wallet to the creator's wallet. DOLLA's wallet never touches the funds.

Premium tier subscriptions work the same way, with the recipient being the corporate Smart Wallet that operates the platform — a standard SaaS-style merchant relationship.

What this means for risk

• No bankruptcy contagion. If DOLLA shuts down tomorrow, every user keeps full ownership of their wallet, their balance, and the right to revoke any active spend permission. The platform's continued existence is not a precondition for funds being safe.
• No fund commingling. There is no pooled DOLLA omnibus account. There is nothing to commingle.
• On-chain auditability. Every permission, every charge, every refund is recorded on Base mainnet and queryable by any independent reviewer.

Prohibited content

• Adult / NSFW / suggestive material
• Gratuitous violence or graphic content
• Targeted harassment or hate speech
• Politically divisive content (the platform is intentionally welcoming across the spectrum)
• Gambling or sports betting promotion
• Regulated-substance promotion (alcohol marketing, tobacco, cannabis sales)
• Firearms or weapons sales
• Financial advice presented as guaranteed returns; trading signals presented as risk-free
• Mis- and dis-information targeting elections, public health, or vulnerable populations

Encouraged content categories (representative)

Charity & nonprofits · Environmental sustainability · Faith & spirituality · Fitness & wellness · Education & tutoring · Arts, music, & creativity · Culinary & food · Animals & pets · Youth mentorship · Health & medical education · Sports & coaching · Tech & innovation education · Financial literacy (budgeting, saving, debt freedom — not trading signals).

Enforcement

• Server-side moderation pipeline wired against the OpenAI Moderation API at upload and post time; first-pass enforcement is being completed inside the current sprint and will gate any user-generated text and media before publish.
• User reporting flow with a dedicated admin moderation queue (in build).
• Tier-gated content limits (e.g. comment-character limits) reduce surface for low-effort abuse.
• Real-user-cap gate — production currently caps non-seed real-user signups at a small whitelist value, configurable by admins; this lets us scale signups behind moderation maturity rather than ahead of it.
• DMCA process in flight: designated agent registration ($6/year via the Copyright Office) plus takedown workflow targeted for completion in Q2.

The 51%-style charitable commitment is a board-governed corporate declaration: the majority of DOLLA's premium-tier revenue is committed to charitable distribution through partnered nonprofit channels. This is a corporate-level commitment carried out through standard charitable rails — we deliberately do not make per-transaction on-chain claims at the platform level, both to comply with charitable-solicitation conservatism and to avoid overstating any audit posture before our 501(c)(3) partner formation is complete.

Founder: Evan Estremera. Financial-markets background; runs Sentivue Capital and Kingdom Portfolios; reachable at affluenceer@gmail.com.

If it would be useful, we can additionally provide under NDA: our internal compliance memo, our institutional architecture breakdown (already drafted), our admin diagnostic surfaces (transaction ledger, gas-economics projector, real-user cap settings), and a live walk-through of the production app and Onramp surface from a non-admin user's perspective.

Live surfaces

Coinbase ecosystem usage

Base mainnet contracts in use

Contact