The Connext cross-chain bridging protocol has announced a new token standard to reduce losses from bridge hacks. According to a July 24 announcement, the new “xERC-20” standard allows token issuers to maintain a list of official bridges and control how many tokens can be minted by each.
Instead of each bridge issuing its own version of a token on every network, the new standard would allow bridges to mint “official” or “canonical” versions of each token. However, they can only do this with the permission of the token issuer, and this permission would be enforced through smart contracts. Token issuers would also be able to limit the number of coins that a particular bridge could mint, the proposal stated.
Under EIP-7281, bridges could still mint their own versions of tokens, but such derivative coins would not be considered “canonical” versions. As a result, consumers would eventually come to reject unofficial versions of coins.
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