The arbitrage detector that prices every cost before it trades

A CEX quote and a DEX quote for the same asset rarely match, and the gap looks like free money until a taker fee, the DEX's own price impact, gas and the cost of rebalancing inventory eat most of it. arb-bot starts from that honest number instead of the gross one, on venues it can actually use: OKX EEA (the MiCA-licensed OKX entity for Europe) and Binance spot.

Discovery re-verifies each candidate pair on-chain for symbol and decimals, then probes liquidity with quoter round-trips at trade size; a guard compares the route's price against the CEX ticker and drops anything that diverges too far. The net spread itself subtracts the CEX taker fee, a VWAP walk of the live order book, DEX fee and price impact, current gas, an amortized rebalancing cost and a safety buffer, six cost lines in all, all in Decimal arithmetic.

Majors sit net-negative most of the time, so arb-bot is built to catch short dislocations instead: every positive spread is journaled the instant it appears, the scan cadence bursts to once a second while it holds and a paper fill re-quotes both venues after real latency before it books a result. The universe stays auto-discovered and capped at 60 pairs, the dashboard shows it running live and nothing here has placed a real order, opened a transaction or needed an API key. None of it is investment advice.