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feat: simulate co-signed transaction before sponsored broadcast#534

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stevencartavia wants to merge 1 commit into
wevm:mainfrom
stevencartavia:sponsor-simulate-cosigned
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feat: simulate co-signed transaction before sponsored broadcast#534
stevencartavia wants to merge 1 commit into
wevm:mainfrom
stevencartavia:sponsor-simulate-cosigned

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@stevencartavia

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The Tempo fee-payer pre-broadcast simulation now simulates the co-signed transaction the sponsor actually broadcasts (concrete fee payer + chosen fee token) instead of the pre-cosign 0x78 envelope, and fails closed (no broadcast) when the simulation reverts. Adds revert and ABI conformance fixtures.

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pkg-pr-new Bot commented Jun 11, 2026

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npm i https://pkg.pr.new/mppx@534

commit: 02e16cb

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