Decibel, an on-chain perpetual contract exchange incubated by Aptos Labs, has launched on the Aptos mainnet. Previously, its testnet had over 700,000 unique accounts and 132,000 daily active users. The platform processes orders and risk management entirely on-chain, using a centralized limit order book and USDCBL stablecoin as the default collateral. Decibel aims to establish itself in the perpetual contract market with a trading volume of up to $920 billion in 30 days, and plans to add spot markets and tokenized physical assets in the future.