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set_dapp_metadata Function

fn set_dapp_metadata(&self, fee_payer_address: String);

  • To facilitate cross-chain transactions, it is necessary to cover the fees on the Router chain. This is achieved via the set_dapp_metadata function available in the Gateway contracts. The function takes a fee_payer_address parameter, which represents the account responsible for covering the transaction fees for any cross-chain requests originating from the dApp.

  • Once the fee_payer_address is set, the designated fee payer must approve the request to act as the fee payer on the Router chain. Without this approval, dApps will not be able to execute any cross-chain transactions.

  • It's important to note that any fee refunds resulting from these transactions will be credited back to the dApp's fee_payer_address on the Router chain.