WePiggy has been deployed on various well-known public chains and Layer 2 networks such as Ether, OKExChain (OEC), Coinan Smart Chain (BSC), Polygon, Firecoin Ecochain (HECO), Arbitrum, Optimism, Moonriver, Harmony, etc. It is live on Moonbeam and other platforms, enabling exchange and lending of cross-chain assets.
Across aggregates a liquidity pool of ERC20 tokens on Ether to facilitate quick withdrawals of token deposits on the Layer 2 (L2) network, such as Optimism and Arbitrum. layer 2 deposits are one-way, sent from the L2 network's slow native bridge to a pool of funds on Ether to repay the liquidity provider. This can be thought of as the liquidity provider providing a short-term loan on Ether secured by a layer 2 deposit. To bridge the tokens, the relayer issues a bond alongside the L2 deposit details that allows withdrawals from the liquidity pool on Ether after a short challenge period. Relayers can also prepay money to the depositor and get themselves reimbursed from the liquidity pool after the challenge period. the oracle mechanism of UMA allows anyone to challenge an invalid relay during the challenge period and to claim the relayer's bond if the relay is incorrect. Depositors are paid a fee by the liquidity provider based on their utilization.