File message construction (key inside the E2EE envelope)

[codebestia]

A file message has contentType ∈ {file,image,video,audio} whose envelope ciphertext carries { fileId, fileName, mimeType, size, fileKey, thumbnail? }. The server only sees fileId reference (validated ready + access-controlled) and the opaque ciphertext. The fileKey is NEVER stored server-side in plaintext.

Acceptance criteria:

• File messages validated to reference a ready file authorized for the sender
• fileKey only ever inside envelope ciphertext
• Fan-out identical to text messages

[Emoji-dot]

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[DatboiCaleb]

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Hi Good day Maintainer

I’m a smart contract and full-stack developer who turns complex ideas into secure, production-ready blockchain code. With strong skills in Rust and Solidity, I build systems that are fast, safe, and built to last.
My experience with the Stellar SDK and Soroban lets me ship real-world Web3 solutions that actually move value.

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[firstJOASH]

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i can solve this issue
kindly assign me

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[GdAyo19]

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[solidsole]

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I'm interested in working on this issue and would love to submit a PR for it. Please assign it to me so I can get started.

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[DeJune06]

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hello my name is June please can i work on this issue?

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[drips-wave]

Congratulations, @DeJune06! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

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