nimbus-eth2/ncli/README.md

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# Introduction
`ncli` is a set of low level / debugging tools to interact with the nimbus [beacon chain specification](https://github.com/ethereum/eth2.0-specs/tree/dev/specs) implementation, simliar to [zcli](https://github.com/protolambda/zcli). With it, you explore SSZ, make state transitions and compute hash tree roots.
# Tools
* transition: Perform state transition given a pre-state and a block to apply (both in SSZ format)
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* hash_tree_root: Print tree root of an SSZ object
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* pretty: Pretty-print SSZ object as JSON
# Building
Follow the instructions from [nim-beacon-chain](../README.md)
```bash
git clone https://github.com/status-im/nim-beacon-chain.git
cd nim-beacon-chain
make
```
# Usage
```
# Build with minimal config
../env.sh nim c -d:const_preset=minimal ncli_transition
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# Build with mainnet config
../env.sh nim c -d:const_preset=mainnet ncli_transition
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# Run..
./ncli_transition --help
```