Is XSGD only on the Zilliqa blockchain?

XSGD is on both the Zilliqa and Ethereum blockchains

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Referring to https://www.straitsx.com/, under See XSGD In Action, we can see the specific addresses for the smart contracts that represent XSGD

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As a note, do always ensure that you're interacting with the above specific addresses when using XSGD on both the Ethereum and Zilliqa blockchains!