ETH源码学习(2)GetBalance
从这开始读,因为最简单。还能对重要的东西有所理解。如果是单节点debug,重启链之后余额会归零,所以最少要两个节点,同步区块就没这个问题了,具体原因还未知。 声明:eth版本:Geth/v1.10.7-unstable/darwin-arm64/go1.17.5,我对比了网上的一些文章,这块代码有改动,主要以下改变从BlockChain的snap中读account几乎放弃从trie中获取account,判断极为严苛,我想不到有什么情况能进入,应该是放弃了这层分析入口//命令 eth.getBalance('0x0d7dd6dbabee2ec9b325aa7aa8b42d75068e8597') //入口 func (s *PublicBlockChainAPI) GetBalance(ctx context.Context, address common.Address, blockNrOrHash rpc.BlockNumberOrHash) (*hexutil.Big, error) { //获取statedb state, _, err := s.b.StateAndHea...
Ether.js+Web3modal基础使用
1.说明现在网站会提供很多种钱包,web3modal可以提供统一的provider,不需要你操心太多东西用ether.js而不是web3.js的原因是简单,爽2.安装npm i web3modal npm i ethers //另外还需要安装对应wallet的包,自行搜索就行 3.连接钱包// MM默认就有,无需显式加入 const providerOptions = { walletconnect: { package: walletconnectProvider, options: { infuraId: "", }, }, }; //构建Web3Modal对象 const web3Modal = new Web3Modal({ //缓存provider cacheProvider: true, providerOptions, }); //连接wallet async function connect() { try { const web3ModalProvider = await web3Modal.connect(); provider = new ethers.pr...
Go获取合约事件日志
func main() { client, err := ethclient.Dial("https://rinkeby-light.eth.linkpool.io/") if err != nil { log.Fatal(err) } //获取当前的最新区块 header, err := client.HeaderByNumber(context.Background(), nil) if err != nil { log.Fatal(err) } fmt.Println("最新区块", header.Number.String()) // 5671744 //开始查询日志,可以添加过滤条件,查询符合你想要的日志 query := ethereum.FilterQuery{ FromBlock: big.NewInt( 10570948), ToBlock: header.Number, Addresses: []common.Address{ common.HexToAddress("0x40490DF1cc631817D24BA324147c59821C8970BF"), ...
ETH源码学习(2)GetBalance
从这开始读,因为最简单。还能对重要的东西有所理解。如果是单节点debug,重启链之后余额会归零,所以最少要两个节点,同步区块就没这个问题了,具体原因还未知。 声明:eth版本:Geth/v1.10.7-unstable/darwin-arm64/go1.17.5,我对比了网上的一些文章,这块代码有改动,主要以下改变从BlockChain的snap中读account几乎放弃从trie中获取account,判断极为严苛,我想不到有什么情况能进入,应该是放弃了这层分析入口//命令 eth.getBalance('0x0d7dd6dbabee2ec9b325aa7aa8b42d75068e8597') //入口 func (s *PublicBlockChainAPI) GetBalance(ctx context.Context, address common.Address, blockNrOrHash rpc.BlockNumberOrHash) (*hexutil.Big, error) { //获取statedb state, _, err := s.b.StateAndHea...
Ether.js+Web3modal基础使用
1.说明现在网站会提供很多种钱包,web3modal可以提供统一的provider,不需要你操心太多东西用ether.js而不是web3.js的原因是简单,爽2.安装npm i web3modal npm i ethers //另外还需要安装对应wallet的包,自行搜索就行 3.连接钱包// MM默认就有,无需显式加入 const providerOptions = { walletconnect: { package: walletconnectProvider, options: { infuraId: "", }, }, }; //构建Web3Modal对象 const web3Modal = new Web3Modal({ //缓存provider cacheProvider: true, providerOptions, }); //连接wallet async function connect() { try { const web3ModalProvider = await web3Modal.connect(); provider = new ethers.pr...
Go获取合约事件日志
func main() { client, err := ethclient.Dial("https://rinkeby-light.eth.linkpool.io/") if err != nil { log.Fatal(err) } //获取当前的最新区块 header, err := client.HeaderByNumber(context.Background(), nil) if err != nil { log.Fatal(err) } fmt.Println("最新区块", header.Number.String()) // 5671744 //开始查询日志,可以添加过滤条件,查询符合你想要的日志 query := ethereum.FilterQuery{ FromBlock: big.NewInt( 10570948), ToBlock: header.Number, Addresses: []common.Address{ common.HexToAddress("0x40490DF1cc631817D24BA324147c59821C8970BF"), ...
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下载geth,创建genesis.json
{
"config": {
"chainId": 8888, //自行修改
"homesteadBlock": 0,
"daoForkBlock": 0,
"daoForkSupport": true,
"eip150Block": 0,
"eip155Block": 0,
"eip158Block": 0,
"byzantiumBlock": 0,
"constantinopleBlock": 0,
"petersburgBlock": 0,
"ethash": {}
},
"nonce": "0x42",
"timestamp": "0x0",
"extraData": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",
"gasLimit": "0xffffffff",
"difficulty": "0x700000",//难度,越大挖矿越慢
"alloc": {
"093f59f1d91017d30d8c2caa78feb5beb0d2cfaf": {
"balance": "0xffffffffffffffff"
},
"ddf7202cbe0aaed1c2d5c4ef05e386501a054406": {
"balance": "0xffffffffffffffff"
}
}
}
下载geth,创建genesis.json
{
"config": {
"chainId": 8888, //自行修改
"homesteadBlock": 0,
"daoForkBlock": 0,
"daoForkSupport": true,
"eip150Block": 0,
"eip155Block": 0,
"eip158Block": 0,
"byzantiumBlock": 0,
"constantinopleBlock": 0,
"petersburgBlock": 0,
"ethash": {}
},
"nonce": "0x42",
"timestamp": "0x0",
"extraData": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",
"gasLimit": "0xffffffff",
"difficulty": "0x700000",//难度,越大挖矿越慢
"alloc": {
"093f59f1d91017d30d8c2caa78feb5beb0d2cfaf": {
"balance": "0xffffffffffffffff"
},
"ddf7202cbe0aaed1c2d5c4ef05e386501a054406": {
"balance": "0xffffffffffffffff"
}
}
}
因为要分析源码,所以不是像网上命令行执行,而是使用goland debug

参数
--datadir "/Users/zhangnan/Downloads/self_eth/" init "/Users/zhangnan/Downloads/geth/genesis.json"
初始化
func initGenesis(ctx *cli.Context) error {
// Make sure we have a valid genesis JSON
genesisPath := ctx.Args().First()
if len(genesisPath) == 0 {
utils.Fatalf("Must supply path to genesis JSON file")
}
file, err := os.Open(genesisPath)
if err != nil {
utils.Fatalf("Failed to read genesis file: %v", err)
}
defer file.Close()
genesis := new(core.Genesis)
if err := json.NewDecoder(file).Decode(genesis); err != nil {
utils.Fatalf("invalid genesis file: %v", err)
}
//以上是读初始化文件,下面开始第一个重要步骤,配置config
// Open and initialise both full and light databases
stack, _ := makeConfigNode(ctx)
defer stack.Close()
for _, name := range []string{"chaindata", "lightchaindata"} {
chaindb, err := stack.OpenDatabase(name, 0, 0, "", false)
if err != nil {
utils.Fatalf("Failed to open database: %v", err)
}
_, hash, err := core.SetupGenesisBlock(chaindb, genesis)
if err != nil {
utils.Fatalf("Failed to write genesis block: %v", err)
}
chaindb.Close()
log.Info("Successfully wrote genesis state", "database", name, "hash", hash)
}
return nil
}
因为要分析源码,所以不是像网上命令行执行,而是使用goland debug

参数
--datadir "/Users/zhangnan/Downloads/self_eth/" init "/Users/zhangnan/Downloads/geth/genesis.json"
初始化
func initGenesis(ctx *cli.Context) error {
// Make sure we have a valid genesis JSON
genesisPath := ctx.Args().First()
if len(genesisPath) == 0 {
utils.Fatalf("Must supply path to genesis JSON file")
}
file, err := os.Open(genesisPath)
if err != nil {
utils.Fatalf("Failed to read genesis file: %v", err)
}
defer file.Close()
genesis := new(core.Genesis)
if err := json.NewDecoder(file).Decode(genesis); err != nil {
utils.Fatalf("invalid genesis file: %v", err)
}
//以上是读初始化文件,下面开始第一个重要步骤,配置config
// Open and initialise both full and light databases
stack, _ := makeConfigNode(ctx)
defer stack.Close()
for _, name := range []string{"chaindata", "lightchaindata"} {
chaindb, err := stack.OpenDatabase(name, 0, 0, "", false)
if err != nil {
utils.Fatalf("Failed to open database: %v", err)
}
_, hash, err := core.SetupGenesisBlock(chaindb, genesis)
if err != nil {
utils.Fatalf("Failed to write genesis block: %v", err)
}
chaindb.Close()
log.Info("Successfully wrote genesis state", "database", name, "hash", hash)
}
return nil
}
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