# Polymarket Hack: Building Safer Bots for 5-Minute Solana Markets

*A security incident highlights why trading systems should separate market data, strategy logic and signing. Here is where Solana shreds and decoded transactions fit.*

A Polymarket bot watching five-minute SOL markets needs more than a fast price feed. It needs to understand what determines the outcome, what is actually available to trade, and which components are allowed to move money.

The October 29 Polymarket security incident makes those boundaries especially relevant.

Solana transaction data can add another dimension to a trading system: activity in the underlying asset's on-chain markets. But using that information effectively requires a clear distinction between a signal, a settlement price and an executable opportunity.

## What happened in the Polymarket hack?

According to Polymarket's October 30 postmortem, an attacker compromised a third-party performance-monitoring script loaded on its website. For some users with active sessions, the malicious script sold positions and moved funds out of their wallets.

Polymarket said it removed the script, paused trading and relayer operations, and reset active sessions. Its update reported that 95% of affected wallets had been refunded, with $3.9 million being returned across drained funds and additional compensation. These figures describe that update, not a final independent accounting. [Polymarket incident report](https://status.polymarket.com/cmvvek1i90eme14ruga1z6tuj).

For developers, the lesson is not simply to avoid a particular vendor. It is to avoid giving every component in a trading system the same authority.

A dashboard should display information. A data adapter should collect it. Neither should automatically inherit unrestricted access to the account's signing keys.

## From account security to trading-system design

The connection between this incident and bot architecture is separation of responsibilities.

A useful design separates four functions:

- **Observation:** collecting market data without trading authority.
- **Research:** producing features and probability estimates.
- **Risk control:** deciding whether an action is permitted.
- **Execution:** signing and submitting narrowly defined orders.

This does not make a system immune to compromise. It makes the permissions and failure modes easier to reason about.

For compatible Deposit Wallet integrations, Polymarket documents beta session keys that can trade without withdrawal authority. They still permit economically harmful trades if compromised, so they are not a substitute for exposure limits and monitoring. [Polymarket session-key documentation](https://docs.polymarket.com/trading/session-keys).

The same separation helps answer the next question: what information should the strategy actually consume?

## How five-minute SOL markets resolve

A five-minute SOL Up/Down contract is not simply a bet on the next Solana swap.

Polymarket's documentation states that five-minute crypto markets moved to a **60-second Chainlink time-weighted average price**, or TWAP, on August 14, 2026. The opening reference and closing reference must be understood according to the specific market's rules. A last-second DEX trade is not interchangeable with that reference. [Polymarket changelog](https://docs.polymarket.com/changelog/predictions).

Before researching a strategy, record the exact market's resolution source, averaging window, opening reference, closing time and tie handling. The title alone is insufficient. [Polymarket resolution documentation](https://docs.polymarket.com/concepts/resolution).

That distinction changes the research problem.

The question is not:

"Did someone just buy SOL?"

It is:

"Does this new information improve our estimate of the market's defined outcome—and is the current order-book price attractive after costs?"

## Where Solana shreds fit

Solana shreds carry pieces of Solana ledger data. They do **not** contain Polymarket's order book or reveal its private orders.

Their potential role is on the underlying-asset side: helping a developer observe Solana activity and investigate whether it contains useful information about short-horizon SOL market conditions.

For example, a research pipeline could examine:

- Directional activity across selected SOL trading pools.
- Whether activity is concentrated in one venue or spread across several.
- Changes in transaction intensity.
- Divergence between observed transaction intent and subsequently confirmed execution.

These are candidate features, not established trading edges. A large swap may be part of an arbitrage route, offset elsewhere, fail to execute or contain little new information.

The value comes from testing those possibilities—not assuming that a transaction count predicts the next candle.

## Combining Polymarket data with Shredo

A practical research system has several distinct inputs:

| Input | Role |
| --- | --- |
| Polymarket market stream | Observe outcome-token prices, available depth and book changes |
| Applicable Chainlink reference feed | Track the price series relevant to resolution |
| CEX market data | Provide broader SOL price and liquidity context |
| Shredo Solana feed | Research additional on-chain transaction features |

Polymarket provides market-stream updates and documents PolyBolt for reference-price subscriptions. These serve different purposes: the outcome-token book tells you what can be traded, while the reference stream helps you model what determines the outcome. [Market-stream documentation](https://docs.polymarket.com/market-data/realtime-data), [PolyBolt documentation](https://docs.polymarket.com/api-reference/live-data/overview).

Shredo supplies the Solana observation layer—not a replacement for either.

### Decoded Transactions: start with transaction research

[Shredo Decoded Transactions](https://docs.shredo.xyz/products/decoded-transactions) delivers signed Solana transaction observations over TLS gRPC, with program and account filters.

It is a practical starting point when the research question concerns transactions and instructions, rather than packet reconstruction.

Your application still needs protocol-specific interpretation. An observed instruction is not automatically a classified buy or sell, and signed intent does not prove successful execution or finality. Add execution and state data separately where those distinctions matter.

### Raw Shreds: control the reconstruction pipeline

[Shredo Raw Shreds](https://docs.shredo.xyz/products/raw-shreds) delivers raw UDP shreds for teams building their own ingestion and reconstruction infrastructure.

This offers more control over that pipeline, with more engineering responsibility: packet loss, continuity, reconstruction and downstream decoding all need explicit handling.

Raw Shreds and Decoded Transactions are alternative entry points into Solana observation. You do not need both simply to begin researching a Polymarket strategy.

## Test whether the extra signal is useful

Start with a baseline using Polymarket's book, the applicable reference feed, time remaining and broader SOL market data. Then add Solana-derived features.

Keep the evaluation causal: a replay must use only information your system had received at the decision time. Do not backdate an observation using a block timestamp or use a later execution result as though it was known earlier.

Compare the baseline and augmented models on later, untouched periods. Evaluate probability calibration and realistic trading outcomes—not just directional accuracy.

Include:

- Fees, spread and available depth.
- Decision-to-order latency and applicable trading delays.
- Partial fills, rejected orders and cancellation races.
- Feed interruptions and periods when trading is unavailable.

Measure where the Solana features help, where they do nothing and where they hurt. An additional subscription or a faster observation is useful only if it improves the complete system.

## Build the stop conditions first

A five-minute market can expire while a feed is disconnected or an order is unresolved.

Define what the bot should do when its reference price is stale, its book is incomplete, its transaction feed reports a gap or the platform stops accepting orders. Losing visibility should not silently increase risk.

Keep signing authority out of dashboards and analytics processes. Record intended orders separately from acknowledged orders, fills and reconciled positions.

These controls are engineering recommendations, not a claim that they would have prevented the October incident.

## The takeaway

The Polymarket incident is a reminder that automation needs clear trust boundaries.

For five-minute SOL markets, it also helps to maintain clear **data boundaries**: Polymarket supplies the trading venue, the specified reference determines resolution, and Solana activity can provide additional features to research.

Shredo gives developers access to that Solana layer through Raw Shreds or Decoded Transactions.

The goal is not to turn every observed swap into an Up/Down order. It is to build a measurable pipeline that can distinguish useful information from noise—and keep execution under control.

*This article describes research architecture, not a proven profitable strategy. Access and trading must comply with applicable law and Polymarket's restrictions.*