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    Interface WrappedKey

    A key wrapped for a specific recipient via X3DH-based envelope.

    Design note (differs from some implementations): the envelope INCLUDES the initiator's Ed25519 identity public key — without it the recipient cannot complete X3DH. Some legacy envelopes omit this field assuming out-of-band knowledge; here it is explicit so envelopes are self-contained.

    interface WrappedKey {
        wrappedKey: Uint8Array;
        iv: Uint8Array;
        ephemeralPublicKey: Uint8Array;
        initiatorIdentityPublicKey: Uint8Array;
        usedOneTimePreKeyId: string;
        v: 1;
    }
    Index
    wrappedKey iv ephemeralPublicKey initiatorIdentityPublicKey usedOneTimePreKeyId v
    wrappedKey: Uint8Array

    AES-GCM encrypted target key bytes (GCM tag included).

    iv: Uint8Array

    12-byte IV.

    ephemeralPublicKey: Uint8Array

    Initiator's ephemeral X25519 public key (from X3DH).

    initiatorIdentityPublicKey: Uint8Array

    Initiator's Ed25519 identity public key — needed by the recipient to complete X3DH.

    usedOneTimePreKeyId: string

    Base64url (unpadded) of the consumed OTK public key — recipient uses it to select their matching OTK private key.

    v: 1

    Envelope version.

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