ETH: ETH's shit

[hhstore]

related:

• xxx
• xxx

[hhstore]

以太坊的一些狗屎:

sign 签名里的魔法前缀:

• 签名里的魔法前缀. 暗坑.
• 关于这个魔法的讨论:
  • Sign message is using incorrect prefix ethereum/go-ethereum#14794
  • Web3J Sign VS Web3JS - different results hyperledger-web3j/web3j#486
  • https://www.cnblogs.com/wanghui-garcia/p/9642492.html

static const _messagePrefix = '\u0019Ethereum Signed Message:\n';

• https://github.com/simolus3/web3dart/blob/3c18d98c84/lib/src/credentials/credentials.dart#L17

• go-eth 的源码位置:

• https://github.com/ethereum/go-ethereum/blob/bf468a81ec/internal/ethapi/api.go#L360

• https://github.com/ethereum/go-ethereum/blob/bf468a81ec261745b25206b2a596eb0ee0a24a74/internal/ethapi/api.go#L361

swap token test:

• https://kovan.etherscan.io/address/0x9fe1901f3bb6cd21dca275f5e746409bd4ae8861
• https://kovan.etherscan.io/tx/0xd5ccd51fead6622086dea75cad4f719d852d5346a173fc412db1b87b131675a3

[hhstore]

swap test case:

• 使用 uniswap 生成的 data, 然后通过 wallet 再次签名后, 广播出交易.

 test('eth token swap:', () async {
    var privateKey = 'your-private-key';

    var walletAddress = '0x9fe1901f3bb6cd21dca275f5e746409bd4ae8861';
    var contractAddress = '0x7a250d5630b4cf539739df2c5dacb4c659f2488d';

    ///
    var amount = BigInt.tryParse('0x314b3d2e4230000') ?? BigInt.from(0);
    var dataStr =
        '0x7ff36ab5000000000000000000000000000000000000000000000012897e29405bf7874500000000000000000000000000000000000000000000000000000000000000800000000000000000000000009fe1901f3bb6cd21dca275f5e746409bd4ae88610000000000000000000000000000000000000000000000000000000060a6486a0000000000000000000000000000000000000000000000000000000000000002000000000000000000000000d0a1e359811322d97991e03f863a0c30c2cf029c0000000000000000000000004f96fe3b7a6cf9725f59d353f723c1bdb64ca6aa';

    var txID = await cliKovan.swapToken2(
      privateKey: privateKey,
      fromAddress: walletAddress,
      toAddress: contractAddress,
      data: dataStr,
      value: amount,
    );

    print('swap token: txID:$txID');
  });

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ETH 全节点数据:

• https://cn.etherscan.com/chartsync/chaindefault
• 截止当前: 2021-06-17,
• GETH: 是 800GB 左右.
• openethereum: 是 444GB 左右.

使用 openethereum 同步节点:

• https://github.com/openethereum/openethereum
• https://ethereum.org/en/developers/docs/nodes-and-clients/#clients