Terminology
The key words "MUST", "SHALL", "SHOULD", and "MAY" in this document are to be interpreted as described in RFC 2119.
The term "Zcash" in this document is to be interpreted as described in the Zcash Trademark Donation and License Agreement ( or successor agreement).
The term "network upgrade" in this document is to be interpreted as described in ZIP 200 and the Zcash Trademark Donation and License Agreement ( or successor agreement).
The term "block subsidy" in this document is to be interpreted as described in section 3.9 of the Zcash Protocol Specification .
The term "halving" in this document are to be interpreted as described in sections 7.7 of the Zcash Protocol Specification .
The terms "Bootstrap Project" (or "BP"), "Electric Coin Company" (or "ECC"), "Zcash Foundation" (or "ZF"), "Major Grants", "BP slice", "ZF slice", and "MG slice" in this document are to be interpreted as described in ZIP 1014 .
The terms "Testnet" and "Mainnet" are to be interpreted as described in section 3.11 of the Zcash Protocol Specification .
"Canopy" is the code-name for the fifth Zcash network upgrade, also known as Network Upgrade 4.
Specification
The Blossom network upgrade changed the height of the first halving to block height 1046400 , as a consequence of reducing the block target spacing from 150 seconds to 75 seconds.
Since ZIP 1014 specifies that the Zcash Development Fund starts at the first halving, the activation height of Canopy on Mainnet therefore SHALL be 1046400.
ZIP 207 SHALL be activated in Canopy.
The following funding streams are defined for Mainnet:
Stream |
Numerator |
Denominator |
Start height |
End height |
FS_ZIP214_BP |
7 |
100 |
1046400 |
2726400 |
FS_ZIP214_ZF |
5 |
100 |
1046400 |
2726400 |
FS_ZIP214_MG |
8 |
100 |
1046400 |
2726400 |
As specified in , a funding stream is active for a span of blocks that includes the block at its start height, but excludes the block at its end height.
The following funding streams are defined for Testnet:
Stream |
Numerator |
Denominator |
Start height |
End height |
FS_ZIP214_BP |
7 |
100 |
1028500 |
2796000 |
FS_ZIP214_ZF |
5 |
100 |
1028500 |
2796000 |
FS_ZIP214_MG |
8 |
100 |
1028500 |
2796000 |
Notes:
- The block heights of halvings are different between Testnet and Mainnet, as a result of different activation heights for the Blossom network upgrade (which changed the block target spacing). The end height of these funding streams corresponds to the second halving on each network.
- On Testnet, the activation height of Canopy will be before the first halving. Therefore, the consequence of the above rules for Testnet is that the amount sent to each Zcash Development Fund recipient address will initially (before Testnet block height 1116000) be double the number of currency units as the corresponding initial amount on Mainnet. This reduces to the same number of currency units as on Mainnet, from Testnet block heights 1116000 (inclusive) to 2796000 (exclusive).
Dev Fund Recipient Addresses
For each of Testnet and Mainnet, before deploying this ZIP in a node implementation with the activation height set for that network, each of the parties (ECC on behalf of BP; and ZF) SHALL generate sequences of recipient addresses to be used for each stream in each funding period:
- ECC SHALL generate the addresses for the
FS_ZIP214_BP
funding stream, which on Mainnet corresponds to the BP slice;
- ZF SHALL generate the addresses for the
FS_ZIP214_ZF
and FS_ZIP214_MG
funding streams, which on Mainnet correspond to the ZF slice and MG slice respectively.
Within each stream, the addresses MAY be independent, or MAY be repeated between funding periods. Each party SHOULD take account of operational security issues associated with potential compromise of the associated spending keys.
Funds sent to each Mainnet funding stream SHALL be governed by all requirements on the corresponding slice specified in ZIP 1014 .
No requirements are imposed on the use of funds sent to Testnet funding streams.
Direct-grant option
ZIP 1014 specifies a "direct-grant option" by which, if agreed upon by both ECC and ZF before Canopy activation, some portion of the MG slice may be directly assigned to the grantee(s), rather than accepted and disbursed by ZF.
The funding stream mechanism allows for this option by adding a funding stream corresponding to each direct grantee, with addresses generated by ZF. In this case the total value of funding streams assigned to direct grantees MUST be subtracted from the value of the funding stream for the remaining MG slice (or, if all Major Grants are direct, replace the funding stream for the MG slice).
For each network upgrade after Canopy requiring modifications to the set of direct grantees, a separate ZIP SHOULD be published specifying those modifications.
Mainnet Recipient Addresses
FS_ZIP214_BP.AddressList[0..47] = [
"t3LmX1cxWPPPqL4TZHx42HU3U5ghbFjRiif",
"t3Toxk1vJQ6UjWQ42tUJz2rV2feUWkpbTDs",
"t3ZBdBe4iokmsjdhMuwkxEdqMCFN16YxKe6",
"t3ZuaJziLM8xZ32rjDUzVjVtyYdDSz8GLWB",
"t3bAtYWa4bi8VrtvqySxnbr5uqcG9czQGTZ",
"t3dktADfb5Rmxncpe1HS5BRS5Gcj7MZWYBi",
"t3hgskquvKKoCtvxw86yN7q8bzwRxNgUZmc",
"t3R1VrLzwcxAZzkX4mX3KGbWpNsgtYtMntj",
"t3ff6fhemqPMVujD3AQurxRxTdvS1pPSaa2",
"t3cEUQFG3KYnFG6qYhPxSNgGi3HDjUPwC3J",
"t3WR9F5U4QvUFqqx9zFmwT6xFqduqRRXnaa",
"t3PYc1LWngrdUrJJbHkYPCKvJuvJjcm85Ch",
"t3bgkjiUeatWNkhxY3cWyLbTxKksAfk561R",
"t3Z5rrR8zahxUpZ8itmCKhMSfxiKjUp5Dk5",
"t3PU1j7YW3fJ67jUbkGhSRto8qK2qXCUiW3",
"t3S3yaT7EwNLaFZCamfsxxKwamQW2aRGEkh",
"t3eutXKJ9tEaPSxZpmowhzKhPfJvmtwTEZK",
"t3gbTb7brxLdVVghSPSd3ycGxzHbUpukeDm",
"t3UCKW2LrHFqPMQFEbZn6FpjqnhAAbfpMYR",
"t3NyHsrnYbqaySoQqEQRyTWkjvM2PLkU7Uu",
"t3QEFL6acxuZwiXtW3YvV6njDVGjJ1qeaRo",
"t3PdBRr2S1XTDzrV8bnZkXF3SJcrzHWe1wj",
"t3ZWyRPpWRo23pKxTLtWsnfEKeq9T4XPxKM",
"t3he6QytKCTydhpztykFsSsb9PmBT5JBZLi",
"t3VWxWDsLb2TURNEP6tA1ZSeQzUmPKFNxRY",
"t3NmWLvZkbciNAipauzsFRMxoZGqmtJksbz",
"t3cKr4YxVPvPBG1mCvzaoTTdBNokohsRJ8n",
"t3T3smGZn6BoSFXWWXa1RaoQdcyaFjMfuYK",
"t3gkDUe9Gm4GGpjMk86TiJZqhztBVMiUSSA",
"t3eretuBeBXFHe5jAqeSpUS1cpxVh51fAeb",
"t3dN8g9zi2UGJdixGe9txeSxeofLS9t3yFQ",
"t3S799pq9sYBFwccRecoTJ3SvQXRHPrHqvx",
"t3fhYnv1S5dXwau7GED3c1XErzt4n4vDxmf",
"t3cmE3vsBc5xfDJKXXZdpydCPSdZqt6AcNi",
"t3h5fPdjJVHaH4HwynYDM5BB3J7uQaoUwKi",
"t3Ma35c68BgRX8sdLDJ6WR1PCrKiWHG4Da9",
"t3LokMKPL1J8rkJZvVpfuH7dLu6oUWqZKQK",
"t3WFFGbEbhJWnASZxVLw2iTJBZfJGGX73mM",
"t3L8GLEsUn4QHNaRYcX3EGyXmQ8kjpT1zTa",
"t3PgfByBhaBSkH8uq4nYJ9ZBX4NhGCJBVYm",
"t3WecsqKDhWXD4JAgBVcnaCC2itzyNZhJrv",
"t3ZG9cSfopnsMQupKW5v9sTotjcP5P6RTbn",
"t3hC1Ywb5zDwUYYV8LwhvF5rZ6m49jxXSG5",
"t3VgMqDL15ZcyQDeqBsBW3W6rzfftrWP2yB",
"t3LC94Y6BwLoDtBoK2NuewaEbnko1zvR9rm",
"t3cWCUZJR3GtALaTcatrrpNJ3MGbMFVLRwQ",
"t3YYF4rPLVxDcF9hHFsXyc5Yq1TFfbojCY6",
"t3XHAGxRP2FNfhAjxGjxbrQPYtQQjc3RCQD"
]
FS_ZIP214_ZF.AddressList[0..47] = ["t3dvVE3SQEi7kqNzwrfNePxZ1d4hUyztBA1"] * 48
FS_ZIP214_MG.AddressList[0..47] = ["t3XyYW8yBFRuMnfvm5KLGFbEVz25kckZXym"] * 48
(i.e. FS_ZIP214_ZF.AddressList
and FS_ZIP214_MG.AddressList
for Mainnet each consist of 48 repetitions of the same address).
Testnet Recipient Addresses
FS_ZIP214_BP.AddressList[0..50] = [
"t26ovBdKAJLtrvBsE2QGF4nqBkEuptuPFZz",
"t26ovBdKAJLtrvBsE2QGF4nqBkEuptuPFZz",
"t26ovBdKAJLtrvBsE2QGF4nqBkEuptuPFZz",
"t26ovBdKAJLtrvBsE2QGF4nqBkEuptuPFZz",
"t2NNHrgPpE388atmWSF4DxAb3xAoW5Yp45M",
"t2VMN28itPyMeMHBEd9Z1hm6YLkQcGA1Wwe",
"t2CHa1TtdfUV8UYhNm7oxbzRyfr8616BYh2",
"t2F77xtr28U96Z2bC53ZEdTnQSUAyDuoa67",
"t2ARrzhbgcpoVBDPivUuj6PzXzDkTBPqfcT",
"t278aQ8XbvFR15mecRguiJDQQVRNnkU8kJw",
"t2Dp1BGnZsrTXZoEWLyjHmg3EPvmwBnPDGB",
"t2KzeqXgf4ju33hiSqCuKDb8iHjPCjMq9iL",
"t2Nyxqv1BiWY1eUSiuxVw36oveawYuo18tr",
"t2DKFk5JRsVoiuinK8Ti6eM4Yp7v8BbfTyH",
"t2CUaBca4k1x36SC4q8Nc8eBoqkMpF3CaLg",
"t296SiKL7L5wvFmEdMxVLz1oYgd6fTfcbZj",
"t29fBCFbhgsjL3XYEZ1yk1TUh7eTusB6dPg",
"t2FGofLJXa419A76Gpf5ncxQB4gQXiQMXjK",
"t2ExfrnRVnRiXDvxerQ8nZbcUQvNvAJA6Qu",
"t28JUffLp47eKPRHKvwSPzX27i9ow8LSXHx",
"t2JXWPtrtyL861rFWMZVtm3yfgxAf4H7uPA",
"t2QdgbJoWfYHgyvEDEZBjHmgkr9yNJff3Hi",
"t2QW43nkco8r32ZGRN6iw6eSzyDjkMwCV3n",
"t2DgYDXMJTYLwNcxighQ9RCgPxMVATRcUdC",
"t2Bop7dg33HGZx3wunnQzi2R2ntfpjuti3M",
"t2HVeEwovcLq9RstAbYkqngXNEsCe2vjJh9",
"t2HxbP5keQSx7p592zWQ5bJ5GrMmGDsV2Xa",
"t2TJzUg2matao3mztBRJoWnJY6ekUau6tPD",
"t29pMzxmo6wod25YhswcjKv3AFRNiBZHuhj",
"t2QBQMRiJKYjshJpE6RhbF7GLo51yE6d4wZ",
"t2F5RqnqguzZeiLtYHFx4yYfy6pDnut7tw5",
"t2CHvyZANE7XCtg8AhZnrcHCC7Ys1jJhK13",
"t2BRzpMdrGWZJ2upsaNQv6fSbkbTy7EitLo",
"t2BFixHGQMAWDY67LyTN514xRAB94iEjXp3",
"t2Uvz1iVPzBEWfQBH1p7NZJsFhD74tKaG8V",
"t2CmFDj5q6rJSRZeHf1SdrowinyMNcj438n",
"t2ErNvWEReTfPDBaNizjMPVssz66aVZh1hZ",
"t2GeJQ8wBUiHKDVzVM5ZtKfY5reCg7CnASs",
"t2L2eFtkKv1G6j55kLytKXTGuir4raAy3yr",
"t2EK2b87dpPazb7VvmEGc8iR6SJ289RywGL",
"t2DJ7RKeZJxdA4nZn8hRGXE8NUyTzjujph9",
"t2K1pXo4eByuWpKLkssyMLe8QKUbxnfFC3H",
"t2TB4mbSpuAcCWkH94Leb27FnRxo16AEHDg",
"t2Phx4gVL4YRnNsH3jM1M7jE4Fo329E66Na",
"t2VQZGmeNomN8c3USefeLL9nmU6M8x8CVzC",
"t2RicCvTVTY5y9JkreSRv3Xs8q2K67YxHLi",
"t2JrSLxTGc8wtPDe9hwbaeUjCrCfc4iZnDD",
"t2Uh9Au1PDDSw117sAbGivKREkmMxVC5tZo",
"t2FDwoJKLeEBMTy3oP7RLQ1Fihhvz49a3Bv",
"t2FY18mrgtb7QLeHA8ShnxLXuW8cNQ2n1v8",
"t2L15TkDYum7dnQRBqfvWdRe8Yw3jVy9z7g"
]
FS_ZIP214_ZF.AddressList[0..50] = ["t27eWDgjFYJGVXmzrXeVjnb5J3uXDM9xH9v"] * 51
FS_ZIP214_MG.AddressList[0..50] = ["t2Gvxv2uNM7hbbACjNox4H6DjByoKZ2Fa3P"] * 51
(i.e. FS_ZIP214_ZF.AddressList
and FS_ZIP214_MG.AddressList
for Testnet each consist of 51 repetitions of the same address).