Meter Passport V1.5 went live after a rigorous audit by HAECHI. Meter Passport is an N-way blockchain router that allows both assets and smart contracts to travel across heterogeneous blockchain networks.
One of Meter’s goals is maximizing interoperability with other public blockchains. Meter Passports is currently secured by five relayers including Protofire, Harshquark, Wetez, InfinityStones, and Meter team through multisig contracts. The next version will support an unlimited number of relayers. It can transfer native tokens, and tokens in various token standards like ERC20, ERC721, and ERC1155 in addition to passing arbitrary generic messages between blockchains. A user transferring tokens from Chain A to Chain B first deposits the tokens into the bridge contract of Chain A. The contract locks the tokens on Chain A, emitting an event once the deposit is successful. The relayers, off -chain operators of the system, will listen to these events and create a relay transaction to the relay chain . The Relayers propose a vote on the data of the deposit and submit their signatures on the relay chain . Once the threshold is met, one of the relayers or any user can collect all the s...