shardnet validator setup

shardnet-validator-setup.sh

# Install build dependencies and Rust
sudo apt install clang build-essential make
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

# clone latest version of Nearcore
git clone https://github.com/near/nearcore
cd nearcore
git fetch origin --tags
git checkout 8448ad1eb

# Compile binary- it is generated in target/release/neard
cargo build -p neard --release --features shardnet

# Init working directory- generates config.json and node_key.json; downloads genesis.json
./target/release/neard --home ~/.near init --chain-id shardnet --download-genesis

# Folder structure in ~/.near
# - config.json: consensus details
# - genesis.json: genesis file
# - node_key.json: Contains the node's public-private keypair and account_id.
# - data: for blockchain state

# Fetch the correct config.json for Shardnet
rm ~/.near/config.json
wget -O ~/.near/config.json \
  https://s3-us-west-1.amazonaws.com/build.nearprotocol.com/nearcore-deploy/shardnet/config.json

# Fetch genesis.json
wget -O ~/.near/genesis.json \
  https://s3-us-west-1.amazonaws.com/build.nearprotocol.com/nearcore-deploy/shardnet/genesis.json