Please see Proposal file for more info
GO Ethereum (Geth)
Node/NPM
Metamask Chrome Extension
setting up ethereum network first create an etherum folder in main directory
Instructions and setup initially done on MAC adjust accordingly
cd ~
mkdir ethereum
cd ethereum
Create some ether accounts
geth account new --datadir data/node-1
should output an address like 0xccb91Cf4495E16d067477cA007553F39CD75700c
geth account new --datadir data/node-2
should output an address like 0x07547f39B8586Ff177108d35a92D234883596395
geth account new --datadir data/node-3
should output an address like 0x7b2f82d749cfafDB126362e14a0334be5B1b41f2
create genesis file in data directory - Example template link below
https://gist.github.com/jdaly13/9176c4f0ce02fe26df110a35994c8913
Make sure your alloc field in the file matches the address you created in accounts remove 0x from beginning
In a terminal tab
initialize genesis block
Make sure you update genesis.json to add your accounts and change network ID
geth --datadir data/node-1 init data/genesis.json
Once initiliazed you can run the node
geth --datadir data/node-1 --networkid 8572054696 --rpc --rpcaddr "0.0.0.0" --rpccorsdomain "*" --port 30303 --rpcapi admin,debug,eth,miner,net,personal,txpool,web3 --ipcdisable --nodiscover --allow-insecure-unlock
Explanation of flags below
--datdir {data directory}
--networkid {how others can find you should be same as chain ID in genesis file}
--rpc{http}
--rpcaddr interface 0.0.0.0 allows all incoming connections
--port {network port}
--rpcapi {apis associated with http that you can use in javascript console }
--ipcdisable {default server unix domain socket we use http instead }
--nodiscover {means you manually add peers instead of built in find mechanism}
--allow-insecure-unlock allows you to unlock accounts via http
whenn above command is run succesfully you should see output to the console like
INFO [09-03|12:18:46.920] Allocated cache and file handles database=/Users/jdaly/ethereum/data/node-1/geth/chaindata cache=512.00MiB handles=5120
INFO [09-03|12:18:47.072] Opened ancient database database=/Users/jdaly/ethereum/data/node-1/geth/chaindata/ancient
INFO [09-03|12:18:47.074] Initialised chain configuration config="{ChainID: 8572054695 Homestead: 0 DAO: <nil> DAOSupport: false EIP150: 0 EIP155: 0 EIP158: 0 Byzantium: 0 Constantinople: 0 Petersburg: 0 Istanbul: <nil>, Muir Glacier: <nil>, YOLO v1: <nil>, Engine: ethash}"
INFO [09-03|12:18:47.074] Disk storage enabled for ethash caches dir=/Users/jdaly/ethereum/data/node1/geth/ethash count=3
INFO [09-03|12:18:47.074] Disk storage enabled for ethash DAGs dir=/Users/jdaly/Library/Ethash count=2
INFO [09-03|12:18:47.074] Initialising Ethereum protocol versions="[65 64 63]" network=8572054695 dbversion=<nil>
WARN [09-03|12:18:47.074] Upgrade blockchain database version from=<nil> to=8
INFO [09-03|12:18:47.078] Loaded most recent local header number=0 hash="169996…e9c61e" td=1 age=51y4mo4w
INFO [09-03|12:18:47.078] Loaded most recent local full block number=0 hash="169996…e9c61e" td=1 age=51y4mo4w
INFO [09-03|12:18:47.078] Loaded most recent local fast block number=0 hash="169996…e9c61e" td=1 age=51y4mo4w
INFO [09-03|12:18:47.079] Regenerated local transaction journal transactions=0 accounts=0
INFO [09-03|12:18:47.090] Allocated fast sync bloom size=512.00MiB
INFO [09-03|12:18:47.091] Initialized fast sync bloom items=4 errorrate=0.000 elapsed="271.202µs"
INFO [09-03|12:18:47.091] Starting peer-to-peer node instance=Geth/v1.9.20-stable/darwin-amd64/go1.15
INFO [09-03|12:18:47.132] New local node record seq=1 id=fe1300dba05b839e ip=127.0.0.1 udp=0 tcp=30301
INFO [09-03|12:18:47.132] Started P2P networking self="enode://294ea3783e96cb2b17de38fb1d574dab85246b63a949bcc5fc291d7b4df2a4a16b1f55fd4e14656e8bb337116c43e86a8e71db4d36b7856106f205ea342cf90b@127.0.0.1:30301?discport=0"
INFO [09-03|12:18:47.133] HTTP server started endpoint=127.0.0.1:8545 cors= vhosts=localhost
INFO [09-03|12:18:47.142] Mapped network port proto=tcp extport=30301 intport=30301 interface=NAT-PMP(192.168.1.1)
notice this line
INFO [09-03|12:18:47.132] Started P2P networking self="enode://294ea3783e96cb2b17de38fb1d574dab85246b63a949bcc5fc291d7b4df2a4a16b1f55fd4e14656e8bb337116c43e86a8e71db4d36b7856106f205ea342cf90b@127.0.0.1:30301?discport=0"
and the enode address
in seperate tab (tab2) attach the javascript console
geth attach http://localhost:8545
Notice if we don't set --rpcport or rpcaddress it defaults to localhost:8545
the console should appear run
admin.nodeInfo.enode
will output something different than above and notice IP address difference from one above
enode://294ea3783e96cb2b17de38fb1d574dab85246b63a949bcc5fc291d7b4df2a4a16b1f55fd4e14656e8bb337116c43e86a8e71db4d36b7856106f205ea342cf90b@68.184.194.48:30301?discport=0
initialize second node with same genesis file
Run this in a 3rd terminal tab
geth --datadir data/node-2 init data/genesis.json
Run the second node
geth --datadir data/node-2 --networkid 8572054696 --rpc --rpcport 8000 --rpccorsdomain "*" --port 30302 --rpcapi admin,debug,eth,miner,net,personal,txpool,web3 --ipcdisable --nodiscover --allow-insecure-unlock
should see output like
INFO [09-03|12:25:05.394] Started P2P networking self="enode://490fd34b6d9c4c82066ab65041244b539afe9aaf93de54cb21b5d15f80382dbb70695a0d274f864648e69eacfb700e82a5c79f450167dd9499a9ffeefe1e7b00@127.0.0.1:30302?discport=0"
in seperate tab fourth tab - attach javascript console notice port we set above of 8000
geth attach http://localhost:8000
then run
admin.nodeInfo
make sure info matches like enode and genesis block should output address below notice the IP is the public address and not localhost but same nodekey
enode://490fd34b6d9c4c82066ab65041244b539afe9aaf93de54cb21b5d15f80382dbb70695a0d274f864648e69eacfb700e82a5c79f450167dd9499a9ffeefe1e7b00@68.184.194.48:30302?discport=0
In the same tab Run
admin.peers
should return empty array []
Now add the first node as a peer you will use the enode address but use the localhost IP instead of public
admin.addPeer("${enode from first node}")
based on this readme value would be - Adjust yours accordingly
enode://294ea3783e96cb2b17de38fb1d574dab85246b63a949bcc5fc291d7b4df2a4a16b1f55fd4e14656e8bb337116c43e86a8e71db4d36b7856106f205ea342cf90b@127.0.0.1:30301?discport=0
should return true but need to actually test if was added run
admin.peers
should output an array with an object
[{
caps: ["eth/63", "eth/64", "eth/65"],
enode: "enode://1f18cab668b97045d19eb7d4674cf89fd9f62a54d10ab4458e2f67038aece4c45fef7c8d3c7a33dd505e9feadb257969e692381c1e44f4597c4af7fe2e51c4a0@127.0.0.1:30303?discport=0",
id: "9ac659ea2b866cb8c752f3f6f05b5ef083f1174a8088f6c5b4d3b54b2d12261c",
name: "Geth/v1.9.12-stable/darwin-amd64/go1.14",
network: {
inbound: false,
localAddress: "127.0.0.1:50476",
remoteAddress: "127.0.0.1:30303",
static: true,
trusted: false
},
protocols: {
eth: {
difficulty: 1,
head: "0x1699961eea62df74c0c5fe76d5e35cd972b55187f5508042f8c8010781e9c61e",
version: 65
}
}
}]
we need a miner to mine the transaction to the block in tab 4
miner.start(1)
the 1 is the miner is the cpu threads param
we need to be able to mine transactions if we are to deploy smart contracts
make sure you unlock account before you deploy
in geth console for node (tab2) for which you are deploying node-1
personal.unlockAccount(personal.listAccounts[0])
will prompt for password
eth.getBlock("latest")
will output something like
{
difficulty: 135464,
extraData: "0xd78301090c846765746886676f312e31348664617277696e",
gasLimit: 4007125504,
gasUsed: 0,
hash: "0x4d2b1641a7b21c755c17b71767db3a418f2b16cf676d85483042d1c21421ea32",
logsBloom: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
miner: "0x07547f39b8586ff177108d35a92d234883596395",
mixHash: "0x69fece8f56cf802270f5c95d21dcabd57de11c8db7419c1804d599185aa2c034",
nonce: "0x0584c58bb8782acf",
number: 71,
parentHash: "0xbaaeb67fa2ed1f2f5e6c85ec9c86bdcc3674da944078cbcc1ebe03004ca551e3",
receiptsRoot: "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
sha3Uncles: "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
size: 536,
stateRoot: "0x66b7f5a2dc0c3d0bbca0a9ccfa38b7cc14edd271f43d4a76629ca69a1ca1dc0a",
timestamp: 1600268417,
totalDifficulty: 9460801,
transactions: [],
transactionsRoot: "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
uncles: []
}
look at gaslimit value make sure you use value below that for your gas limit in your deploy script - We need enough gas to be mined but not too much to be over limit
so if gasLimit was 3948826961 use a number lower but not too low e.g. 2948826961
Create a fifth tab
cd smart_contracts
Install dependencies
npm i
Open deploy.js in your favorite editor at ~line 84 change gas amount to lower one above
Change any other values as needed e.g. if you started on different port
Now Deploy contract
node deploy
It should log out a contract address and block number which it was mined
It should create two files one is token-abi.json the other is contract-address.json
Both files will be written to smart contracts and survey-app/src directory for later use
in the log you can see which block contract deployed from then in node 1 js terminal
in either geth terminal
eth.getBlock({number})
The transactions array should not be empty
in node2 js tab run
personal.unlockAccount(personal.listAccounts[0])
Before we run interaction script go into interaction.js and update account values
now in same tab you ran node deploy now run
node interaction
should return some logs and something like this when a purchase is completed
Essentially a purchase is an exchange ethereum for tokens
{
blockHash: '0x794f331443399b5e9a186ff52dfa0e3ab895d0199185a0ccc5e4e93dcdb897f4',
blockNumber: 798,
contractAddress: null,
cumulativeGasUsed: 52504,
from: '0x07547f39b8586ff177108d35a92d234883596395',
gasUsed: 52504,
logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000080000000000000000000800000000000020000000000000000000000000000000000000000000000008000008000000000000000000000000000000000000000000000800000000000000000800000000000000000000000110000000000000000000000000000000000000000000000000000000000000000000000080000000000000000000000010000000000000000000000000010000000000000000000002000000100000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000',
status: true,
to: '0x097932275c20b0675e4a3e9e44ea44d2c1283320',
transactionHash: '0x720700c9be73b3738da302dbebcd59417e6f50426493d8266245095054905cfb',
transactionIndex: 0,
events: {
Transfer: {
address: '0x097932275c20B0675E4a3E9E44eA44d2C1283320',
blockNumber: 798,
transactionHash: '0x720700c9be73b3738da302dbebcd59417e6f50426493d8266245095054905cfb',
transactionIndex: 0,
blockHash: '0x794f331443399b5e9a186ff52dfa0e3ab895d0199185a0ccc5e4e93dcdb897f4',
logIndex: 0,
removed: false,
id: 'log_bccd14a5',
returnValues: [Result],
event: 'Transfer',
signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
raw: [Object]
},
Bought: {
address: '0x097932275c20B0675E4a3E9E44eA44d2C1283320',
blockNumber: 798,
transactionHash: '0x720700c9be73b3738da302dbebcd59417e6f50426493d8266245095054905cfb',
transactionIndex: 0,
blockHash: '0x794f331443399b5e9a186ff52dfa0e3ab895d0199185a0ccc5e4e93dcdb897f4',
logIndex: 1,
removed: false,
id: 'log_1840c938',
returnValues: [Result],
event: 'Bought',
signature: '0x4e08ba899977cf7d4c2964bce71c6b9a7ef76ee5166a4c1249a1e08016e33ef1',
raw: [Object]
}
}
}
When you complete a survey you get a small amount of tokens
Make sure you have meta mask installed and configure it to connect to the same network in which smart contract was deployed which should be localhost:8545
create meta mask account and make sure you are connected to localhost:8545
once that is created you need to import you accounts from geth
goto settings -> import account -> select json from dropdown and import the file from your keystore for instance directory node-1/keystore/ and also enter password
You may have to expand view in browser it may take a second or two
Once you imported your ether address you can then add token
Under account should be add token button
choose custom token and paste in token address from contract-address.json
in seperate tab fifth tab
cd survey-app && npm i
then run the Survey application
npm run start
When the browser opens click to connect the app to metamask
Complete survey and earn WWT tokens
on the machine you have two local nodes running run
ifconfig|grep netmask|awk '{print $2}'
This will output your local IP address something like 192.168.1.190
On another machine within your network run a new node
You'll need to follow steps as above and have a genesis block initialize it and run the node
create the file structure and within ethereum directory run
geth --datadir data/node1 init data/genesis.json
geth --datadir data/node1 --networkid 8572054696 --rpc --rpcport 8001 --port 30305 --rpcapi admin,debug,eth,miner,net,personal,txpool,web3 --ipcdisable --nodiscover --rpccorsdomain "*"
In second terminal tab run
geth attach http://localhost:8001
Then add your peer you will need enode from your first node
admin.addPeer("enode://06674435ab583830edb43da0d01f3594c663eacf0e9be770b84c67f29a8cd0b02a10e4bb440f3e598d6911bdb97de21d6a37d499003966c7ab07a80271d5ae56@192.168.1.190:30303?discport=0")
Notice the IP address is not your public IP or 127.0.0.1/localhost but your local IP
Once this done - this node can interact with smart contracts deployed on the blockchain
To confirm get the number block of your smart contract or any block number and run on each node
eth.getBlock(47)
You should get the same result for each something like
{
difficulty: 134030,
extraData: "0xd78301090c846765746886676f312e31348664617277696e",
gasLimit: 4102198687,
gasUsed: 1578948,
hash: "0x2dea49c515532922cfaf3a1aeb46788d1826a06e872d86072c4b9128f4680ff6",
logsBloom: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000008000008000000000000000000000000000000000000000000020000000000000000000800000000000000000000000110000000000000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000010000000000000000000002000000000000000000000000000000000000000000000000000020000000000000000000000000002000000000000000000000000000000000000000",
miner: "0x07547f39b8586ff177108d35a92d234883596395",
mixHash: "0xe621fdf0d2f5d6af3cae535a45ead18acd0cd63e06e9134da5e1670e7c832275",
nonce: "0x7f446627226877a5",
number: 47,
parentHash: "0x9345144b9864c53af366f7f5c066cc59d0f968c65bcd7aea918bdd0540a67208",
receiptsRoot: "0x5384ad97cb769a3692b3418da425fa6f3308b69327d2ccc588b73e28c7143b91",
sha3Uncles: "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
size: 6918,
stateRoot: "0xea487e79b609da8ab3f6acc80ddcfa0695df8b70c8bbfbcad17b8e6038424901",
timestamp: 1600286675,
totalDifficulty: 6229674,
transactions: ["0x899a7f4fb0cc1cc2c3b25a441b6ef470eae208c483af8c720c28ba62b95be21f"],
transactionsRoot: "0xaa773597fbc75050d0260d6c63d02be5c2810dee41f1874999d704ef0709e8c3",
uncles: []
}
Genesis block
https://ethereum.stackexchange.com/questions/17202/fatal-failed-to-write-genesis-block-wrong-genesis-block-in-database
Make sure everyone connects using networkid that should be same as genesis block
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