估值102亿融资5.45亿的Alchemy 项目,大学每周任务逐步开始。持有大学生早期卡的伙伴们可以开始大学生活了:
官方大佬的 lens ,可以关注下:
了解更多,请关注作者:https://twitter.com/bitc2024
这一期看文章的内容比较多,请各位自行查看。
这里需要去下载一个钱包,创建一个钱包账户(注意不要导自己的助记词,直接新创建一个),注意最好用一个新的浏览器创建,不要在常用的浏览器创建(谷歌浏览器添加一个新账户创建即可)
官方这里有教程,可以看下,比较简单,我这里就不写了。
领完水后,需要进入官方discord群里,找一个钱包地址发送一些ETH过去,同时自己也要把自己刚刚创建的ETH地址发到这个频道去,内容包含:
1.写一个关于自己的有趣的事情,
2.钱包地址。
以下是频道:
点击上面链接后进不去频道的,需要在discord添加身份:
可以借鉴别人怎么发
随便找个地址发一些ETH给他就行。
注意用上面刚创建的钱包。
发送完第一节的游戏就完成了。
这块内容,主要是查看文章,不是真正做区块链的,看完就好了。
1: Current Block Number
查看要求:
输入:
const provider = require('./provider');
async function getBlockNumber() {
const ret = await provider.send({
jsonrpc: "2.0",
id: 1,
method: "eth_blockNumber",
});
return ret.result;
}
module.exports = getBlockNumber;
点击运行。
2: Get Balance
查看要求:
输入:
const provider = require('./provider');
async function getBalance(address) {
const ret = await provider.send({
jsonrpc: "2.0",
id: 1,
method: "eth_getBalance",
params: [address, "latest"],
});
return ret.result;
}
module.exports = getBalance;
点击运行。
3: Get Nonce
查看要求:
输入:
const provider = require('./provider');
async function getNonce(address) {
const ret = await provider.send({
jsonrpc: "2.0",
id: 1,
method: "eth_getTransactionCount",
params: [address, "latest"],
});
return ret.result;
}
module.exports = getNonce;
点击运行。
4: Block Transactions
查看要求:
输入:
const provider = require('./provider');
async function getTotalTransactions(blockNumber) {
const ret = await provider.send({
jsonrpc: "2.0",
id: 1,
method: "eth_getBlockByNumber",
params: [blockNumber, false],
});
return ret.result.transactions.length;
}
module.exports = getTotalTransactions;
点击运行。
5: Total Wei
查看要求:
输入:
const provider = require('./provider');
async function getTotalBalance(addresses) {
let reqs = [];
for (let i = 0; i < addresses.length; i++) {
reqs.push({
jsonrpc: "2.0",
id: 1,
method: "eth_getBalance",
params: [addresses[i], "latest"],
});
}
const resps = await provider.send(reqs);
let t = 0;
for (let i = 0; i < resps.length; i++) {
t = t + parseInt(resps[i].result);
}
return t;
}
module.exports = getTotalBalance;
点击运行。
1: Making Wallets
查看要求:
输入:
const ethers = require('ethers');
const { Wallet } = ethers;
// create a wallet with a private key
const wallet1 = new Wallet("0xf2f48ee19680706196e2e339e5da3491186e0c4c5030670656b0e0164837257d");
// create a wallet from mnemonic
const wallet2 = Wallet.fromMnemonic("plate lawn minor crouch bubble evidence palace fringe bamboo laptop dutch ice");
module.exports = {
wallet1,
wallet2,
}
点击运行。
2: Sign a Transaction
查看要求:
输入:
const ethers = require('ethers');
const { Wallet, utils } = ethers;
const { wallet1 } = require('./wallets');
const signaturePromise = wallet1.signTransaction({
value: utils.parseEther('1', 'ether'),
to: "0xdD0DC6FB59E100ee4fA9900c2088053bBe14DE92",
gasLimit: utils.parseUnits('21000', 'wei'),
});
module.exports = signaturePromise;
点击运行。
3: Connect to Ethereum
查看要求:
输入:
const { Wallet, utils, providers } = require('ethers');
const { ganacheProvider, PRIVATE_KEY } = require('./config');
const provider = undefined;
const wallet = new Wallet(PRIVATE_KEY);
async function sendEther({ value, to }) {
const rawTx = await wallet.signTransaction({
value, to,
gasLimit: 0x5208,
gasPrice: 0x3b9aca00
});
const provider = new providers.Web3Provider(ganacheProvider);
resp = await provider.sendTransaction(rawTx);
return resp;
}
module.exports = sendEther;
点击运行。
4: Account Nonce
查看要求:
输入:
const { Wallet, utils, providers } = require('ethers');
const { ganacheProvider, PRIVATE_KEY } = require('./config');
const provider = new providers.Web3Provider(ganacheProvider);
const wallet = new Wallet(PRIVATE_KEY, provider);
async function sendEther({ value, to }) {
return wallet.sendTransaction({ value, to });
}
module.exports = sendEther;
点击运行。
5: Find Balance
查看要求:
输入:
const { Wallet, providers } = require('ethers');
const { ganacheProvider } = require('./config');
const provider = new providers.Web3Provider(ganacheProvider);
function findMyBalance(privateKey) {
const wallet = new Wallet(privateKey, provider);
return wallet.getBalance();
}
module.exports = findMyBalance;
点击运行。
6: Charitable Donations
查看要求:
输入:
const { utils, providers, Wallet } = require('ethers');
const { ganacheProvider } = require('./config');
const provider = new providers.Web3Provider(ganacheProvider);
/**
* Donate at least 1 ether from the wallet to each charity
* @param {string} a hex string private key for a wallet with 10 ETH
* @param {array} an array of ethereum charity addresses
*
* @returns {Promise} a promise that resolves after all donations have been sent
*/
async function donate(privateKey, charities) {
const wallet = new Wallet(privateKey, provider);
let resps = [];
nonce = await wallet.getTransactionCount();
for (let i = 0; i < charities.length; i++) {
const rawTx = await wallet.signTransaction({
value: utils.parseEther('1', 'ether'),
to: charities[i],
gasLimit: utils.parseUnits('21000', 'wei'),
nonce: nonce + i
});
resps.push(provider.sendTransaction(rawTx));
}
return Promise.all(resps);
}
module.exports = donate;
点击运行。
1: Where is the Ether?
查看要求:
输入:
const { providers } = require('ethers');
const { ganacheProvider } = require('./config');
const provider = new providers.Web3Provider(ganacheProvider);
/**
* Given an ethereum address find all the addresses
* that were sent ether from that address
* @param {string} address - The hexidecimal address for the sender
* @async
* @returns {Array} all the addresses that receieved ether
*/
async function findEther(address) {
let addrs = [];
let blockNum = await provider.getBlockNumber();
for (let i = 0; i <= blockNum; i++) {
let block = await provider.getBlockWithTransactions(i);
block.transactions.forEach((tx) => {
if (tx.from === address) {
addrs.push(tx.to);
}
});
}
return addrs;
}
module.exports = findEther;
点击运行。
以上,Ethereum,课程学习完成。
未完待续……
了解更多,请关注作者:https://twitter.com/bitc2024