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76 lines
2.6 KiB
ReStructuredText
76 lines
2.6 KiB
ReStructuredText
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Storage Server Donations
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The following is a configuration convention which allows users to anonymously support the operators of storage servers.
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Donations are made using `Zcash shielded transactions`_ to limit the amount of personal information incidentally conveyed.
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Sending Donations
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=================
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To support a storage server following this convention, you need several things:
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* a Zcash wallet capable of sending shielded transactions
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(this *may* require a Zcash full node)
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* a shielded address with sufficient balance
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* a running Tahoe-LAFS client node which knows about the recipient storage server
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For additional protection, you may also wish to operate your Zcash wallet and full node using Tor.
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Find Zcash Shielded Address
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---------------------------
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To find an address at which a storage server operator wishes to receive donations,
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launch the Tahoe-LAFS web UI::
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$ tahoe webopen
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Inspect the page for the storage server area.
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This will have a heading like *Connected to N of M known storage servers*.
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Each storage server in this section will have a nickname.
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A storage server with a nickname beginning with ``zcash:`` is signaling it accepts Zcash donations.
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Copy the full address following the ``zcash:`` prefix and save it for the next step.
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This is the donation address.
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Donation addresses beginning with ``z`` are shielded.
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It is recommended that all donations be sent from and to shielded addresses.
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Send the Donation
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-----------------
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First, select a donation amount.
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Next, use a Zcash wallet to send the selected amount to the donation address.
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Using the Zcash cli wallet, this can be done with a command like::
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$ zcash-cli z_sendmany $YOUR_ADDRESS '[{"address": "$DONATION_ADDRESS", "amount": $AMOUNT}]'
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Remember that you must also have funds to pay the transaction fee
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(which defaults to 0.0001 ZEC in mid-2018).
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Receiving Donations
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===================
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To receive donations from users following this convention, you need the following:
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* a Zcash shielded address
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Configuring Tahoe-LAFS
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----------------------
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The Zcash shielded address is placed in the storage server's ``nickname`` field.
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Edit ``tahoe.cfg`` and edit the ``nickname`` field in the ``node`` section like so::
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[node]
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nickname = zcash:zABCDEF....
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Then restart the storage server.
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Further Reading
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===============
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To acquiant yourself with the security and privacy properties of Zcash,
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refer to the `Zcash documentation`_.
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.. _Zcash shielded transactions: https://z.cash/support/security/privacy-security-recommendations.html#transaction
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.. _Zcash documentation: https://z.cash/technology/index.html
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