This short Rust program simulates Zcash Block Rewards (aka Block Subsidies) assuming Zcash Sustainability Fund backed smoothing out of the issuance curve will be implemented (zcash/zips#706).
You can use devenv.sh to setup a development environment. Otherwise follow the instructions below.
To run the program, you need to have Rust installed. You'll also need some extra libraries to enable plotting, on Ubuntu do:
sudo apt install pkg-config libfreetype6-dev libfontconfig1-dev
Then, clone this repository and run:
cargo run
The program will output the final block that subsidies will be paid out from:
Last block is 47917869 in ~113.88 years
Final block subsidy: 1 (~0 ZEC)
Final ZSF balance: 0 (~0 ZEC)
As well as a summary of subsidies paid out during 4 year periods in between halvings in comparison with the current issuance scheme:
Halvings:
Halving 1 at block 1680000:
ZSF subsidies: 262523884819889 (~ 2625238.848 ZEC, 1.563 ZEC per block)
legacy subsidies: 262500000000000 (~ 2625000.000 ZEC, 1.562 ZEC per block)
difference: 23884819889 (~ 238 ZEC), ZSF/legacy: 1.0001
Halving 2 at block 3360000:
ZSF subsidies: 131259082555273 (~ 1312590.826 ZEC, 0.781 ZEC per block)
legacy subsidies: 131250000000000 (~ 1312500.000 ZEC, 0.781 ZEC per block)
difference: 9082555273 (~ 90 ZEC), ZSF/legacy: 1.0001
Halving 3 at block 5040000:
ZSF subsidies: 65628165536456 (~ 656281.655 ZEC, 0.391 ZEC per block)
legacy subsidies: 65625000000000 (~ 656250.000 ZEC, 0.391 ZEC per block)
difference: 3165536456 (~ 31 ZEC), ZSF/legacy: 1.0000
Halving 4 at block 6720000:
ZSF subsidies: 32813394913130 (~ 328133.949 ZEC, 0.195 ZEC per block)
legacy subsidies: 32812500000000 (~ 328125.000 ZEC, 0.195 ZEC per block)
difference: 894913130 (~ 8 ZEC), ZSF/legacy: 1.0000
Halving 5 at block 8400000:
ZSF subsidies: 16406353535358 (~ 164063.535 ZEC, 0.098 ZEC per block)
legacy subsidies: 16406250000000 (~ 164062.500 ZEC, 0.098 ZEC per block)
difference: 103535358 (~ 1 ZEC), ZSF/legacy: 1.0000
Halving 6 at block 10080000:
ZSF subsidies: 8203004810267 (~ 82030.048 ZEC, 0.049 ZEC per block)
legacy subsidies: 8203124160000 (~ 82031.242 ZEC, 0.049 ZEC per block)
difference: -119349733 (~ -1 ZEC), ZSF/legacy: 1.0000
Halving 7 at block 11760000:
ZSF subsidies: 4101416429306 (~ 41014.164 ZEC, 0.024 ZEC per block)
legacy subsidies: 4101562080000 (~ 41015.621 ZEC, 0.024 ZEC per block)
difference: -145650694 (~ -1 ZEC), ZSF/legacy: 1.0000
Halving 8 at block 13440000:
ZSF subsidies: 2050665226986 (~ 20506.652 ZEC, 0.012 ZEC per block)
legacy subsidies: 2050781040000 (~ 20507.810 ZEC, 0.012 ZEC per block)
difference: -115813014 (~ -1 ZEC), ZSF/legacy: 0.9999
Halving 9 at block 15120000:
ZSF subsidies: 1025311119937 (~ 10253.111 ZEC, 0.006 ZEC per block)
legacy subsidies: 1025389680000 (~ 10253.897 ZEC, 0.006 ZEC per block)
difference: -78560063 (~ 0 ZEC), ZSF/legacy: 0.9999
Halving 10 at block 16800000:
ZSF subsidies: 512644813724 (~ 5126.448 ZEC, 0.003 ZEC per block)
legacy subsidies: 512694000000 (~ 5126.940 ZEC, 0.003 ZEC per block)
difference: -49186276 (~ 0 ZEC), ZSF/legacy: 0.9999
Halving 11 at block 18480000:
ZSF subsidies: 256317033772 (~ 2563.170 ZEC, 0.002 ZEC per block)
legacy subsidies: 256346160000 (~ 2563.462 ZEC, 0.002 ZEC per block)
difference: -29126228 (~ 0 ZEC), ZSF/legacy: 0.9999
Halving 12 at block 20160000:
ZSF subsidies: 128155830300 (~ 1281.558 ZEC, 0.001 ZEC per block)
legacy subsidies: 128172240000 (~ 1281.722 ZEC, 0.001 ZEC per block)
difference: -16409700 (~ 0 ZEC), ZSF/legacy: 0.9999
Halving 13 at block 21840000:
ZSF subsidies: 64076572065 (~ 640.766 ZEC, 0.000 ZEC per block)
legacy subsidies: 64085280000 (~ 640.853 ZEC, 0.000 ZEC per block)
difference: -8707935 (~ 0 ZEC), ZSF/legacy: 0.9999
Halving 14 at block 23520000:
ZSF subsidies: 32037614417 (~ 320.376 ZEC, 0.000 ZEC per block)
legacy subsidies: 32042640000 (~ 320.426 ZEC, 0.000 ZEC per block)
difference: -5025583 (~ 0 ZEC), ZSF/legacy: 0.9998
Halving 15 at block 25200000:
ZSF subsidies: 16018471375 (~ 160.185 ZEC, 0.000 ZEC per block)
legacy subsidies: 16020480000 (~ 160.205 ZEC, 0.000 ZEC per block)
difference: -2008625 (~ 0 ZEC), ZSF/legacy: 0.9999
Halving 16 at block 26880000:
ZSF subsidies: 8009067846 (~ 80.091 ZEC, 0.000 ZEC per block)
legacy subsidies: 8010240000 (~ 80.102 ZEC, 0.000 ZEC per block)
difference: -1172154 (~ 0 ZEC), ZSF/legacy: 0.9999
Halving 17 at block 28560000:
ZSF subsidies: 4004449844 (~ 40.044 ZEC, 0.000 ZEC per block)
legacy subsidies: 4005120000 (~ 40.051 ZEC, 0.000 ZEC per block)
difference: -670156 (~ 0 ZEC), ZSF/legacy: 0.9998
Halving 18 at block 30240000:
ZSF subsidies: 2002182886 (~ 20.022 ZEC, 0.000 ZEC per block)
legacy subsidies: 2002560000 (~ 20.026 ZEC, 0.000 ZEC per block)
difference: -377114 (~ 0 ZEC), ZSF/legacy: 0.9998
Halving 19 at block 31920000:
ZSF subsidies: 1001070275 (~ 10.011 ZEC, 0.000 ZEC per block)
legacy subsidies: 1001280000 (~ 10.013 ZEC, 0.000 ZEC per block)
difference: -209725 (~ 0 ZEC), ZSF/legacy: 0.9998
Halving 20 at block 33600000:
ZSF subsidies: 500525701 (~ 5.005 ZEC, 0.000 ZEC per block)
legacy subsidies: 500640000 (~ 5.006 ZEC, 0.000 ZEC per block)
difference: -114299 (~ 0 ZEC), ZSF/legacy: 0.9998
Halving 21 at block 35280000:
ZSF subsidies: 250255480 (~ 2.503 ZEC, 0.000 ZEC per block)
legacy subsidies: 250320000 (~ 2.503 ZEC, 0.000 ZEC per block)
difference: -64520 (~ 0 ZEC), ZSF/legacy: 0.9997
Halving 22 at block 36960000:
ZSF subsidies: 125126575 (~ 1.251 ZEC, 0.000 ZEC per block)
legacy subsidies: 124320000 (~ 1.243 ZEC, 0.000 ZEC per block)
difference: 806575 (~ 0 ZEC), ZSF/legacy: 1.0065
Halving 23 at block 38640000:
ZSF subsidies: 62556140 (~ 0.626 ZEC, 0.000 ZEC per block)
legacy subsidies: 62160000 (~ 0.622 ZEC, 0.000 ZEC per block)
difference: 396140 (~ 0 ZEC), ZSF/legacy: 1.0064
Halving 24 at block 40320000:
ZSF subsidies: 31271589 (~ 0.313 ZEC, 0.000 ZEC per block)
legacy subsidies: 30240000 (~ 0.302 ZEC, 0.000 ZEC per block)
difference: 1031589 (~ 0 ZEC), ZSF/legacy: 1.0341
Halving 25 at block 42000000:
ZSF subsidies: 15660304 (~ 0.157 ZEC, 0.000 ZEC per block)
legacy subsidies: 15120000 (~ 0.151 ZEC, 0.000 ZEC per block)
difference: 540304 (~ 0 ZEC), ZSF/legacy: 1.0357
Halving 26 at block 43680000:
ZSF subsidies: 7766952 (~ 0.078 ZEC, 0.000 ZEC per block)
legacy subsidies: 6720000 (~ 0.067 ZEC, 0.000 ZEC per block)
difference: 1046952 (~ 0 ZEC), ZSF/legacy: 1.1558
Halving 27 at block 45360000:
ZSF subsidies: 3962388 (~ 0.040 ZEC, 0.000 ZEC per block)
legacy subsidies: 3360000 (~ 0.034 ZEC, 0.000 ZEC per block)
difference: 602388 (~ 0 ZEC), ZSF/legacy: 1.1793
Halving 28 at block 47040000:
ZSF subsidies: 1814216 (~ 0.018 ZEC, 0.000 ZEC per block)
legacy subsidies: 1680000 (~ 0.017 ZEC, 0.000 ZEC per block)
difference: 134216 (~ 0 ZEC), ZSF/legacy: 1.0799
The program will also output PNG files with plots of the issuance curve in plots/:
This simulator is part of our larger efforts to implement the Zcash Sustainability Fund, watch the presentation here
About Eiger
We are engineers. We contribute to various ecosystems by building low level implementations and core components. We believe in Zcash because privacy is critical to a well functioning society.
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