You can see an example in the PSP 2.0 proposal for pre-fee claimer wallets: https://zapper.fi/bundle/0xb1720612d0131839dc489fcf20398ea925282fca,0xcbb65ad3e64f404b5411486e15561bfb645ce642,0x0c84cd406b8a4e07df9a1b15ef348023a1dcd075,0x1bf4c97384e7bdc609017305edb23fd28c13e76a,0xced122f9b99d224675eeda13f0c14639c5633f91?label=ParaSwap%20Protocol%20Fees&id=0x722b23ba5a7a5cccc9279e6cfd37fa9dd5d4bc48
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