polkadot local testnet 波卡私链搭建以及DOT拆分模拟

Polkadot github项目地址：https://github.com/paritytech/polkadot

build

git checkout <latest tagged release>
./scripts/init.sh
cargo build --release

# 编译完后check version
./target/release/polkadot --version

生成私链配置

./target/release/polkadot  build-spec --chain=polkadot-local > local.json

将local.json中的properties修改成DOT对应的参数

{
  "ss58Format": 0,
  "tokenDecimals": 12,
  "tokenSymbol": "DOT"
}

生成raw.json

./target/release/polkadot build-spec --chain=./local.json --raw > localRaw.json

启动私链

#alice
./target/release/polkadot  --chain=./localRaw.json --base-path alice --alice --validator  --port 30334

#bob，对应的nodeID可以从alice启动后的日志中得知
./target/release/polkadot  --chain=./localRaw.json --base-path bob --bob --port 20222 --bootnodes /ip4/127.0.0.1/tcp/30334/p2p/12D3KooWPesXqtyQKxALywSs4hvBihr3CRy8QmTssAjXSprbGo9E --validator

#charlie 此节点可开通ws端口以供外部访问
./target/release/polkadot  --chain=./localRaw.json --base-path charlie --charlie  --rpc-cors all --pruning archive --port 30335 --bootnodes /ip4/127.0.0.1/tcp/30334/p2p/12D3KooWPesXqtyQKxALywSs4hvBihr3CRy8QmTssAjXSprbGo9E --ws-external --ws-port 9966

重置链

./target/release/polkadot purge-chain --base-path alice --chain=./localRaw.json
./target/release/polkadot purge-chain --base-path bob --chain=./localRaw.json
./target/release/polkadot purge-chain --base-path charlie --chain=./localRaw.json

tokeDecimals修改
可直接编辑localRaw.json，将tokeDecimals改成10，再启动链，即可实现DOT百倍拆分