SharedIssueSecret is the data structure that is stored in the newsletter program.
It contains the path and nonce of the newsletter issue.
The path is the path to the newsletter issue's data on IPFS.
The nonce is the nonce used to encrypt the newsletter issue's data with the group
symmetric key.
SharedIssueSecret is the data structure that is stored in the newsletter program. It contains the path and nonce of the newsletter issue. The path is the path to the newsletter issue's data on IPFS. The nonce is the nonce used to encrypt the newsletter issue's data with the group symmetric key.