Blog

Bot engineering, in depth.

How trading bots actually work on Solana, Hyperliquid and Polymarket — written by the people who ship them.

Solana

Aug 22, 2026·1 min read

Solana Account Lock Contention: Why Fast Trading Transactions Still Fail

Writable-account contention can limit a trading bot even when RPC submission is fast.

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Solana

Aug 22, 2026·1 min read

Solana Commitment Levels in Production: Reconcile Confirmed and Finalized State

Mixing processed, confirmed, and finalized reads can create phantom balances and duplicate actions.

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EVM

Aug 22, 2026·1 min read

When an EVM Bot Actually Needs an Archive Node

Archive access is required for old state, not merely for reading old blocks and receipts.

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EVM

Aug 22, 2026·1 min read

EVM Multicall for Trading Bots: Fast Reads Without Inconsistent State

Sequential latest-state reads can combine reserves, balances, and oracles from different blocks.

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EVM

Aug 22, 2026·1 min read

Using debug_traceTransaction to Explain Failed EVM Bot Trades

Receipts show an outcome; traces reveal which nested call, proxy, or token behavior caused it.

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EVM

Aug 22, 2026·1 min read

EVM WebSocket Gap Recovery: Never Lose Blocks or Logs After Reconnect

Subscriptions are low-latency notifications, not a durable event ledger.

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Hyperliquid

Aug 22, 2026·1 min read

Hyperliquid Dead Man’s Switch: Designing Safe Automatic Order Cancellation

Exchange-side scheduled cancellation protects quotes when a process or network dies.

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Hyperliquid

Aug 22, 2026·1 min read

Hyperliquid Batch Order Modification: Partial Results and Recovery

An accepted batch request does not mean every order modification succeeded.

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Hyperliquid

Aug 22, 2026·1 min read

Hyperliquid Fill Reconciliation: Matching Orders, Fills and Positions

Local bot state is a decision cache; the exchange remains authoritative after disconnects and timeouts.

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Polymarket

Aug 22, 2026·1 min read

Polymarket Tick-Size Changes: Preventing Invalid Prices and Broken Quotes

Tick size is runtime market metadata and must not be hard-coded into a quoting engine.

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Polymarket

Aug 22, 2026·1 min read

Polymarket Order Cancellation: Handling Timeouts Without Duplicate Exposure

A cancel request can time out while the order is canceled, live, or partially filled.

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Polymarket

Aug 22, 2026·1 min read

Polymarket Bot Wallet Allowance Security: Limits, Rotation and Monitoring

Token approval is persistent spending authority that can outlive a bot, server, or employee.

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Solana

Aug 22, 2026·1 min read

Jito Bundle Landing Reconciliation: From Submission ID to Confirmed Trades

Block Engine receipt proves submission, not atomic landing or economic success.

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Infrastructure

Aug 22, 2026·1 min read

Clock Synchronization for Trading Bots: Timestamps, Nonces and Incidents

Clock drift causes signature rejects, inverted logs, false timeouts, and broken cross-host reconciliation.

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Infrastructure

Aug 22, 2026·1 min read

RPC Circuit Breakers for Blockchain Bots: Safe Provider Failover

A provider may answer health checks while logs, simulation, or transaction submission is degraded.

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Infrastructure

Aug 17, 2026·1 min read

EVM Nonce Manager for Multi-Worker Trading Bots and Transaction Replacement

How to coordinate EVM nonces, replacement fees and crash recovery when several workers share one execution wallet.

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Infrastructure

Aug 17, 2026·1 min read

Building a Reorg-Safe EVM Indexer with eth_getLogs and Checkpoints

A production design for ingesting EVM logs with bounded block ranges, canonical checkpoints and reversible derived state.

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Hyperliquid

Aug 17, 2026·1 min read

Debugging Hyperliquid Signature Errors: Msgpack, EIP-712 and Signer Recovery

A systematic way to diagnose Hyperliquid signatures that recover the wrong address or fail only for particular actions.

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Hyperliquid

Aug 17, 2026·1 min read

Hyperliquid API Wallet Nonce Management Across Multiple Bot Processes

How to prevent replay errors and nonce collisions when Hyperliquid strategies, subaccounts and workers submit actions concurrently.

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Polymarket

Aug 17, 2026·1 min read

Polymarket CLOB V2 EIP-712 Order Signing: Debugging Invalid Signatures

A field-by-field debugging guide for raw Polymarket CLOB V2 order signing, signature types and mismatches between signed data and the POST body.

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Solana

Aug 17, 2026·1 min read

Decoding Solana v0 Transactions with Address Lookup Tables

A robust method for reconstructing account keys and instructions in Solana v0 transactions that use Address Lookup Tables.

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Infrastructure

Aug 17, 2026·1 min read

Yellowstone gRPC Filter Design for High-Volume Solana Indexers

How to design narrow Yellowstone gRPC subscriptions that reduce bandwidth and decoding load without silently missing relevant Solana events.

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Solana

Aug 17, 2026·1 min read

Why Solana Simulation Succeeds but the Transaction Fails On-Chain

A practical debugging runbook for state drift, stale blockhashes, account contention and compute differences between simulation and live Solana execution.

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Hyperliquid

Aug 15, 2026·1 min read

Hyperliquid Oracle vs Mark Price: Building a Liquidation Monitor

How a liquidation monitor should combine oracle price, mark price, margin state and live positions without generating misleading alerts.

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