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@ -94,7 +94,7 @@ snarkjs powersoftau contribute pot12_0000.ptau pot12_0001.ptau --name="First con
The `contribute` command creates a ptau file with a new contribution.
You'll be prompted to enter some random text as an extra source of entropy.
You'll be prompted to enter some random text to provide an extra source of entropy.
`contribute` takes as input the transcript of the protocol so far, in this case `pot12_0000.ptau`, and outputs a new transcript, in this case `pot12_0001.ptau`, which includes the computation carried out by the new contributor (`ptau` files contain a history of all the challenges and responses that have taken place so far).
@ -141,7 +141,7 @@ snarkjs powersoftau beacon pot12_0003.ptau pot12_beacon.ptau 0102030405060708090
The `beacon` command creates a `ptau` file with a contribution applied in the form of a random beacon.
We need to do apply a random beacon in order to finalise phase 1 of the trusted setup.
We need to apply a random beacon in order to finalise phase 1 of the trusted setup.
> To paraphrase Sean Bowe and Ariel Gabizon, a random beacon is a source of public randomness that is not available before a fixed time. The beacon itself can be a delayed hash function (e.g. 2^40 iterations of SHA256) evaluated on some high entropy and publicly available data. Possible sources of data include: the closing value of the stock market on a certain date in the future, the output of a selected set of national lotteries, or the value of a block at a particular height in one or more blockchains. E.g. the hash of the 11 millionth Ethereum block (which as of this writing is some 3 months in the future). See [here](https://eprint.iacr.org/2017/1050.pdf) for more on the importance of a random beacon.
@ -167,7 +167,7 @@ The `verify` command verifies a powers of tau file.
Before we go ahead and create the circuit, we perform a final check and verify the final protocol transcript.
> Notice there is no longer a warning informing you that the file does not contain phase2 precalculated values.
> Notice there is no longer a warning informing you that the file does not contain phase 2 precalculated values.
### 9. Create the circuit
```sh
@ -257,13 +257,13 @@ snarkjs zkey new circuit.r1cs pot12_final.ptau circuit_0000.zkey
The `zkey new` command creates an initial `zkey` file with zero contributions.
The `zkey` is a zero-knowledge key that includes both the proving and verification keys as well as phase2 contributions.
The `zkey` is a zero-knowledge key that includes both the proving and verification keys as well as phase 2 contributions.
Importantly, one can verify whether a `zkey` belongs to a specific circuit or not.
Note that `circuit_0000.zkey` (the output of the `zkey` command above) does not include any contributions yet, so it cannot be used in a final circuit.
*The following steps (15-20) are similar to the equivalent phase1 steps, except we use `zkey` instead of `powersoftau` as the main command, and we generate `zkey` rather that `ptau` files.*
*The following steps (15-20) are similar to the equivalent phase 1 steps, except we use `zkey` instead of `powersoftau` as the main command, and we generate `zkey` rather that `ptau` files.*
### 15. Contribute to the phase2 ceremony
```sh