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docs: add info about merge of input arrays from multiple parties #8

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22 changes: 22 additions & 0 deletions docs/co-circom-cli/split-input.md
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Expand Up @@ -12,6 +12,28 @@ The above command takes the input `test_vectors/poseidon/input.json` for the cir

These shares can be handed to the 3 different MPC parties for the witness generation phase.

### Input Arrays

Elements in an input array can be provided by different parties by using the `?` character as placeholder for unknown inputs.

`input0.json`:

```json
{
"a": ["1", "?"]
}
```

`input1.json`:

```json
{
"a": ["?", "2"]
}
```

After sharing these inputs, they must be merged with [merge-input-shares](./merge-input-shares.md).

## Reference

```txt
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