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doc/book: add section on using zkrender tool

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2024-04-10 09:51:32 +02:00
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doc/src/zkas/writing-zk-proofs.md
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@@ -75,3 +75,16 @@ log, and compare it with the public values you see in the `witness.json`
from when the proof was created. This will allow you to pinpoint exactly from when the proof was created. This will allow you to pinpoint exactly
where the error occurs. where the error occurs.
## Viewing the ZK Circuit Layout
ZK circuit have a layout. The less empty space, the more efficient is your
circuit. Usually it just means reducing the `k` value specified. The number of
rows in your circuit is $2ᵏ$, so reducing the value by 1 will halve the number
of rows.
To generate an image of the circuit layout, simply run:
```
./bin/zkrunner/zkrender.py -w src/contract/dao/proof/witness/exec.json src/contract/dao/proof/exec.zk /tmp/layout.png
```