Scan to download
BTC $78,100.44 +5.09%
ETH $2,455.57 +5.81%
BNB $644.98 +2.86%
XRP $1.50 +5.24%
SOL $90.29 +4.49%
TRX $0.3254 -0.34%
DOGE $0.1013 +4.08%
ADA $0.2651 +4.83%
BCH $459.93 +4.02%
LINK $9.81 +4.17%
HYPE $45.30 +1.65%
AAVE $117.48 +7.19%
SUI $1.02 +4.37%
XLM $0.1749 +6.06%
ZEC $343.83 +2.00%
BTC $78,100.44 +5.09%
ETH $2,455.57 +5.81%
BNB $644.98 +2.86%
XRP $1.50 +5.24%
SOL $90.29 +4.49%
TRX $0.3254 -0.34%
DOGE $0.1013 +4.08%
ADA $0.2651 +4.83%
BCH $459.93 +4.02%
LINK $9.81 +4.17%
HYPE $45.30 +1.65%
AAVE $117.48 +7.19%
SUI $1.02 +4.37%
XLM $0.1749 +6.06%
ZEC $343.83 +2.00%

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.