Scan to download
BTC $73,639.78 -1.20%
ETH $2,311.91 -2.66%
BNB $612.41 -0.28%
XRP $1.35 -1.37%
SOL $82.82 -3.63%
TRX $0.3235 +0.83%
DOGE $0.0927 -0.70%
ADA $0.2388 -2.01%
BCH $430.80 -1.14%
LINK $9.01 -2.08%
HYPE $43.23 -2.96%
AAVE $99.61 -0.22%
SUI $0.9280 -1.86%
XLM $0.1550 -0.16%
ZEC $351.58 -3.54%
BTC $73,639.78 -1.20%
ETH $2,311.91 -2.66%
BNB $612.41 -0.28%
XRP $1.35 -1.37%
SOL $82.82 -3.63%
TRX $0.3235 +0.83%
DOGE $0.0927 -0.70%
ADA $0.2388 -2.01%
BCH $430.80 -1.14%
LINK $9.01 -2.08%
HYPE $43.23 -2.96%
AAVE $99.61 -0.22%
SUI $0.9280 -1.86%
XLM $0.1550 -0.16%
ZEC $351.58 -3.54%

goplus

GoPlus: Polymarket Hacked, Flaws in Off-Chain and On-Chain Transaction Result Synchronization Mechanism

According to disclosures from the GoPlus Chinese community, the prediction market platform Polymarket was hacked due to a design flaw in the synchronization mechanism between off-chain and on-chain trading results in its order system.The attacker manipulated the nonce, causing on-chain matched trades to be canceled or invalidated before execution, while off-chain records remained valid, leading to API false reports that affected trading behaviors of bots like Negrisk, resulting in user losses. The analysis of the attack process is as follows:The attacker submitted/matched large reverse trades with the market-making bot on the Polymarket off-chain orderbook.The attacker constructed transactions with forged/repeated nonces or utilized on-chain nonce competition, causing the on-chain transactions to inevitably revert.The Polymarket API returned "transaction successful" to the bot before on-chain confirmation, leading the bot to believe that the position had been hedged, while the actual on-chain state had not changed.The attacker then executed real on-chain trades to take advantage of the direction exposed by the bot, thus profiting "risk-free."Since the revert occurred at the chain level, Polymarket fees would not explode, making the attack cost controllable and executable continuously.GoPlus recommends that users pause automated trading tools, verify on-chain trading statuses, enhance wallet security, and closely monitor official announcements from Polymarket.
app_icon
ChainCatcher Building the Web3 world with innovations.