The problem AutoStack(DCA) solves

Crypto investors lack a secure way to automate investment strategies without giving up custody of their funds; we are tyring to solve that via autostack; AutoStack lets you set up recurring token purchases without depositing funds into a vault or trusting a centralized service. You grant a time-bounded, amount-limited permission to a smart contract, and it executes swaps on your behalf at the frequency you specify.

The key difference from existing DCA solutions: your tokens never leave your wallet until the moment of each swap. No lockups, no custody risk.

Challenges we ran into

1. Implementing Advanced Wallet Permissions

Integrating ERC-7715 through the MetaMask Smart Accounts Kit was challenging because the ecosystem is still new.

Issues included:

Limited documentation

Handling session accounts securely

Ensuring permission limits (amount + duration) were enforced correctly

Managing permission expiry

This required careful testing to prevent accidental over-permissioning.

2. Designing a Non-Custodial Automation Model

Most DCA protocols simply hold funds in a vault.
Building automation while keeping funds in the user’s wallet required a different architecture.

Key difficulties:

Triggering swaps without traditional custody

Managing periodic permissions

Ensuring swaps only execute within allowed limits

3. Integrating Smart Money Signals

Pulling whale trading signals from Nansen added complexity.

Challenges included:

Designing a reliable trigger system

Filtering meaningful whale activity

Preventing spam signals

Balancing signal thresholds vs execution speed

4. HTTP Micropayments Integration

Using the x402 Protocol required implementing a new payment flow.

Problems encountered:

Handling HTTP 402 payment responses

Processing small USDC micropayments on Solana

Avoiding repeated payments with caching

5. Real-Time Indexing for the Dashboard

Keeping the frontend synced with blockchain activity required building a real-time indexer using Envio HyperIndex.

Challenges:

Designing efficient event indexing

Updating strategy execution data instantly

Avoiding slow polling-based updates

6. Managing Cross-Chain Components

The system interacts with multiple ecosystems:

Smart contracts on Base

Whale data via Nansen

Micropayments on Solana

Coordinating these components introduced latency and reliability challenges.