Ethereum-SE06

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Web3

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geth attach http://localhost:8545

eth

getStorageAt

获取存储值

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/// 获取 WBTC 的 totalSupply
eth.getStorageAt('0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599', 1)

https://web3js.readthedocs.io/en/v1.2.11/web3-eth.html#getstorageat

EIP-1559

baseFeePerGas（不可配置）：交易基础费用（会被直接燃烧掉）

maxPriorityFeePerGas：最大支付给矿工的费用（给矿工的小费，可提高交易成功率）

maxFeePerGas：baseFeePerGas + maxPriorityFeePerGas

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/// web3 1.5.1
if (tx.gasPrice) {
    // Using legacy gasPrice property on an eip-1559 network,
    // so use gasPrice as both fee properties
    maxPriorityFeePerGas = tx.gasPrice;
    maxFeePerGas = tx.gasPrice;
    delete tx.gasPrice;
} else {
    maxPriorityFeePerGas = tx.maxPriorityFeePerGas || '0x3B9ACA00'; // 1 Gwei
    maxFeePerGas = tx.maxFeePerGas ||
        utils.toHex(
            utils.toBN(block.baseFeePerGas)
                .mul(utils.toBN(2))
                .add(utils.toBN(maxPriorityFeePerGas))
        );
}

baseFeePerGas在计算的时候可以给多一点，因为多余的会被退回来。可以通过getBlockByNumber('latest')获取最后一个区块的baseFeePerGas