feat: preserve sender-signed fields when cosigning fee-payer envelopes#154
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mablr
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Jun 19, 2026
figtracer
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grandizzy
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Fee-payer cosigning rebuilt the transaction lossily, dropping
keyAuthorizationfields (limits+ T6allowed_calls/witness/is_admin/account) andtempo_authorization_list. Since these are part of the sender's signing hash, recovery failed ("Sender address does not match recovered signer"). Now the envelope round-trips these fields verbatim, and unsupported sender signature types are rejected with a clear error.Closes OSS-389