ETH源码阅读(矿工区块奖励)

1.矿工区块奖励计算方法

打包者：blockReward + blockReward/32 * uncles.length

Uncle： ((uncle.Number + 8) - header.Number) * blockReward /8

go-ethereum/consensus/ethash/consensus.go

// AccumulateRewards credits the coinbase of the given block with the mining
// reward. The total reward consists of the static block reward and rewards for
// included uncles. The coinbase of each uncle block is also rewarded.
func accumulateRewards(config *params.ChainConfig, state *state.StateDB, header *types.Header, uncles []*types.Header) {
    // Select the correct block reward based on chain progression
    blockReward := FrontierBlockReward  //5ETH
    if config.IsByzantium(header.Number) { //区块高度 > 4370000
        blockReward = ByzantiumBlockReward   //3ETH
    }
    // Accumulate the rewards for the miner and any included uncles
    reward := new(big.Int).Set(blockReward)
    r := new(big.Int)
    for _, uncle := range uncles {
        r.Add(uncle.Number, big8)
        r.Sub(r, header.Number)
        r.Mul(r, blockReward)
        r.Div(r, big8)
        state.AddBalance(uncle.Coinbase, r) //r = ((uncle.Number + 8) - header.Number) * blockReward /8

        r.Div(blockReward, big32) //r = blockReward/32
        reward.Add(reward, r) //每多一个uncle，打包者会在blockReward的基础上多一个blockReward/32
    }
    state.AddBalance(header.Coinbase, reward) //给挖矿者增加reward
}

2. 区块举例

2.1.https://etherscan.io/block/6365764

etherscan_区块6365764

• 挖矿者奖励
  Block Reward：3.158814429281857873 Ether (3 + 0.065064429281857873 + 0.09375)
  | 值 | 计算方式 |
  |----------|-------------|
  | 3 | ByzantiumBlockReward |
  | 0.09375 | blockReward/32 = 3/32 |
  | 0.065064429281857873 | 交易费 |

• Uncle奖励
  https://etherscan.io/uncle/0xb07c2f04deb0c3f8d7b345854a4bd98e5b7f45854c4e1dfade8f81ef3574b8d0
  Uncles Reward: 2.25 Ether (1 Uncle at Position 0)
  | 值 | 计算方式 |
  |----------|-------------|
  | 2.25 | ((uncle.Number + 8) - header.Number) * blockReward /8 = ((6365762 + 8) - 6365764) * 3 /8 |

2.2.https://blockchair.com/ethereum/block/6365764

blockchair_区块6365764