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ERC-4337 account abstraction toolkit for gasless subscription onboarding.

Middleware for token-gated content and feature access based on NFT membership.

Fiat-to-crypto onramp integration for subscription payments using credit cards.

Membership NFT factory with tiered access, token-gating, and metadata management.

Referral tracking system with reward distribution, invite codes, and conversion attribution.

Automated subscription renewal with payment retry, expiry notifications, and grace periods.

Subscriber relationship management with engagement tracking and communication history.

Subscription management dashboard with active subscribers, revenue, churn, and growth metrics.

Multi-tier access control contract with different permission levels per tier.

Yield-generating subscription contract combining token streaming with DeFi yields.

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