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ERC-7841 Cross-chain Message Format and Mailbox

DraftERCcreated 2024-12-12

A mailbox API and message format to provide a unified cross-chain developer experience

Authors: Ellie Davidson (@elliedavidson), Alex Xiong (@alxiong), Philippe Camacho (@philippecamacho), and Ben Fisch (@benafisch)

Functions this standard introduces (4)

0x3af973b1chain_id()view
0x65b05684inboxDigest(uint32)
0xab8d7af0outboxDigest(uint32)
0x0450c967randSessionId()

What the specification covers

AbstractMotivationSpecificationTerminologyMessage FormatMailbox APIsRationaleMultiple VM SupportArbitrary message payloadUse Metadata Digest Instead of sessionId for Message Query KeyPre-filled InboxRelated ProposalsBackwards CompatibilityReference ImplementationNote on Gas CostExample Usage - Sync and Async Cross-chain TransfersExample Usage - Cross-chain function callsSecurity ConsiderationsCopyright

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