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‎.gitignore

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.blockchain/
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*.log

‎README.md

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# Ethereum dev network
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This repo contains scripts for bootstrapping and running local one-node Ethereum network for development use.
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The bootstrapped network with these parameters is already included:
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```
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Network id: 12342
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Difficulty: 1
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Gas limit: 4712389
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Engine: ethash
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```
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Ten accounts are already created and pre-allocated with Ξ999 each. These accounts are generated using mnemonic `candy maple cake sugar pudding cream honey rich smooth crumble sweet treat`, which you can use when developing with MetaMask. Also, they match ones generated by `truffle develop`.
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```
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0x627306090abab3a6e1400e9345bc60c78a8bef57 (private key c87509a1c067bbde78beb793e6fa76530b6382a4c0241e5e4a9ec0a0f44dc0d3, password 0)
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0xf17f52151ebef6c7334fad080c5704d77216b732 (private key ae6ae8e5ccbfb04590405997ee2d52d2b330726137b875053c36d94e974d162f, password 1)
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0xc5fdf4076b8f3a5357c5e395ab970b5b54098fef (private key 0dbbe8e4ae425a6d2687f1a7e3ba17bc98c673636790f1b8ad91193c05875ef1, password 2)
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0x821aea9a577a9b44299b9c15c88cf3087f3b5544 (private key c88b703fb08cbea894b6aeff5a544fb92e78a18e19814cd85da83b71f772aa6c, password 3)
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0x0d1d4e623d10f9fba5db95830f7d3839406c6af2 (private key 388c684f0ba1ef5017716adb5d21a053ea8e90277d0868337519f97bede61418, password 4)
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0x2932b7a2355d6fecc4b5c0b6bd44cc31df247a2e (private key 659cbb0e2411a44db63778987b1e22153c086a95eb6b18bdf89de078917abc63, password 5)
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0x2191ef87e392377ec08e7c08eb105ef5448eced5 (private key 82d052c865f5763aad42add438569276c00d3d88a2d062d36b2bae914d58b8c8, password 6)
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0x0f4f2ac550a1b4e2280d04c21cea7ebd822934b5 (private key aa3680d5d48a8283413f7a108367c7299ca73f553735860a87b08f39395618b7, password 7)
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0x6330a553fc93768f612722bb8c2ec78ac90b3bbc (private key 0f62d96d6675f32685bbdb8ac13cda7c23436f63efbb9d07700d8669ff12b7c4, password 8)
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0x5aeda56215b167893e80b4fe645ba6d5bab767de (private key 8d5366123cb560bb606379f90a0bfd4769eecc0557f1b362dcae9012b548b1e5, password 9)
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```
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## Running network
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Use `./run-geth` command. Each time you run it, the blockchain will be reset to checkpoint state (which is contained in `blockchain.tar.gz`), so all changes made by the previous run will be rolled back. This is useful when running tests, but you can disable this behavior by passing `-R` flag: `./run-geth -R`.
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By default, only two first accounts are unlocked when `geth` starts. To auto-unlock more accounts, edit `run-geth.sh` and change `--unlock` flag, e.g. `--unlock '0,1,2,3,4,5,6,7,8,9'` to unlock all ten accounts.
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## Bootstrapping new blockchain
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This is needed if you want different parameters (e.g. gas limit, difficulty) than of the pre-bootstrapped chain included in this repo.
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1. Remove `blockchain.tar.gz`.
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2. Edit parameters in `genesis.json`.
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3. If you have changed `config.chainId` in `genesis.json`, update `--networkid` flag in `run-geth.sh` and `init-blockchain.sh` to match it.
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4. Run `./init-blockchain.sh`.
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5. Run `./run-geth.sh -R` and make any changes you wish to checkpoint (adding accounts, making transactions). To add accounts from private keys, use `personal.importRawKey(key, password)`. Exit geth.
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6. Archive generated chain and accounts: `tar -cvzf blockchain.tar.gz .blockchain`.
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7. Update `geth-passwords.txt` if needed.

‎blockchain.tar.gz

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‎genesis.json

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{
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"nonce": "0x0000000000000042",
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"mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
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"difficulty": "0x01",
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"coinbase": "0x0000000000000000000000000000000000000000",
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"timestamp": "0x00",
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"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
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"extraData": "0x",
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"gasLimit": "0x47e7c5",
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"config": {
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"chainId": 12342,
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"homesteadBlock": 0,
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"eip150Block": 0,
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"eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
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"eip155Block": 0,
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"eip158Block": 0,
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"ByzantiumBlock": 0,
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"ethash": {}
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},
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"alloc": {
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"0x0000000000000000000000000000000000000001": {"balance": "1"},
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"0x0000000000000000000000000000000000000002": {"balance": "1"},
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"0x0000000000000000000000000000000000000003": {"balance": "1"},
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"0x0000000000000000000000000000000000000004": {"balance": "1"},
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"0x627306090abab3a6e1400e9345bc60c78a8bef57": {"balance": "999000000000000000000"},
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"0xf17f52151ebef6c7334fad080c5704d77216b732": {"balance": "999000000000000000000"},
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"0xc5fdf4076b8f3a5357c5e395ab970b5b54098fef": {"balance": "999000000000000000000"},
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"0x821aea9a577a9b44299b9c15c88cf3087f3b5544": {"balance": "999000000000000000000"},
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"0x0d1d4e623d10f9fba5db95830f7d3839406c6af2": {"balance": "999000000000000000000"},
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"0x2932b7a2355d6fecc4b5c0b6bd44cc31df247a2e": {"balance": "999000000000000000000"},
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"0x2191ef87e392377ec08e7c08eb105ef5448eced5": {"balance": "999000000000000000000"},
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"0x0f4f2ac550a1b4e2280d04c21cea7ebd822934b5": {"balance": "999000000000000000000"},
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"0x6330a553fc93768f612722bb8c2ec78ac90b3bbc": {"balance": "999000000000000000000"},
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"0x5aeda56215b167893e80b4fe645ba6d5bab767de": {"balance": "999000000000000000000"}
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}
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}

‎geth-passwords.txt

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0
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1
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‎init-blockchain.sh

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#!/bin/sh
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rm -rf .blockchain
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mkdir -p .blockchain
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set -x
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geth \
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--datadir .blockchain \
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--networkid=12342 \
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init genesis.json

‎run-geth.sh

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#!/bin/sh
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set -e
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CPULIMIT_INFO='Running without limiting CPU.
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Install cpulimit for best experience: https://github.com/opsengine/cpulimit
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On Mac, you can use Homebrew:
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brew install cpulimit
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'
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if [ "$1" = '-R' ]; then
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echo
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echo 'Not resetting blockchain'
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echo
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if ! [ -d '.blockchain' ]; then
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tar -xzf blockchain.tar.gz
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fi
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else
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echo
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echo 'Resetting blockchain...'
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echo
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rm -rf .blockchain
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tar -xzf blockchain.tar.gz
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fi
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run() {
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if command -v cpulimit >/dev/null; then
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set -x
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exec cpulimit -i -l 50 "$@"
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else
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echo "$CPULIMIT_INFO"
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set -x
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exec nice -n 10 "$@"
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fi
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}
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run geth \
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--datadir='.blockchain' \
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--networkid=12342 \
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--nodiscover \
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--maxpeers 0 \
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--port=30342 \
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--rpc --rpcapi='db,eth,net,web3,personal' \
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--rpcport '9545' --rpcaddr '127.0.0.1' --rpccorsdomain '*' \
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--unlock '0,1' \
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--password geth-passwords.txt \
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--mine \
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--minerthreads=1 \
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console

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