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README with ptau file

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Jordi Baylina 2020-09-25 07:58:07 +02:00
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@ -161,6 +161,29 @@ We're now ready to prepare phase 2 of the setup (the circuit-specific phase).
Under the hood, the `prepare phase2` command calculates the encrypted evaluation of the Lagrange polynomials at tau for `tau`, `alpha*tau` and `beta*tau`. It takes the beacon `ptau` file we generated in the previous step, and outputs a final `ptau` file which will be used to generate the circuit proving and verification keys.
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**NOTE**
A ptau file for bn128 with the peraperPhase2 54 contributions and a beacon, can be found here:
https://www.dropbox.com/sh/mn47gnepqu88mzl/AACaJkBU7mmCq8uU8ml0-0fma?dl=0
There is a file truncated for each power of two.
The complete file is [powersOfTau28_hez_final.ptau](https://www.dropbox.com/sh/mn47gnepqu88mzl/AADgFSy_UnsSoDwOPy64tpCWa/powersOfTau28_hez_final.ptau?dl=0) which includes 2**28 powers.
And it's blake2b hash is:
55c77ce8562366c91e7cda394cf7b7c15a06c12d8c905e8b36ba9cf5e13eb37d1a429c589e8eaba4c591bc4b88a0e2828745a53e170eac300236f5c1a326f41a
You can find more information about the ceremony [here](https://github.com/weijiekoh/perpetualpowersoftau)
The last ptau file was geneerated using this procedure:
https://www.reddit.com/r/ethereum/comments/iftos6/powers_of_tau_selection_for_hermez_rollup/
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### 8. Verify the final `ptau`
```sh
snarkjs powersoftau verify pot12_final.ptau