(image source:Pixabay)
你有没有发现你STEEM钱包里面SP每天一点点的增加？
想要了解这个问题，先看看白皮书里关于SP部分的解说：
Starting with the network’s 16th hard fork in December 2016, Steem began creating new tokens at an
annual inflation rate of 9.5%. The inflation rate decreases at a rate of 0.01% every 250,000 blocks, or
about 0.5% per year. The inflation will continue decreasing at this pace until the overall inflation rate
reaches 0.95%. This will take about 20.5 years from the time hard fork 16 went into effect.
Of the new tokens that are generated, 75% go to fund the reward pool, which is split between authors and
curators. Another 15% of the new tokens are awarded to holders of SP. The remaining 10% pays for the
witnesses to power the blockchain.
从HF16开始，每年STEEM会通货膨胀产生9.5%的代币。通货膨胀率以每250，000个区块递减0.01%（每年大概递减0.5%）。
通货膨胀率将持续递减到0.95%（大概20.5年时间）。
新产生的代币将有75%放入奖金池，15%给予每位SP的持有者，10%给予见证人。
这是未来30年STEEM的数量，通货膨胀率和每年产生的STEEM的数量。
| Year | Supply | Inflation | New Supply |
|---|---|---|---|
| 2016 | 250,000,000 | 9.50% | 23,750,000 |
| 2017 | 273,750,000 | 9.08% | 24,854,398 |
| 2018 | 298,604,398 | 8.66% | 25,854,554 |
| 2019 | 324,458,952 | 8.24% | 26,727,942 |
| 2020 | 351,186,894 | 7.82% | 27,452,027 |
| 2021 | 378,638,921 | 7.40% | 28,004,740 |
| 2022 | 406,643,661 | 6.98% | 28,364,989 |
| 2023 | 435,008,650 | 6.55% | 28,513,181 |
| 2024 | 463,521,832 | 6.13% | 28,431,762 |
| 2025 | 491,953,593 | 5.71% | 28,105,742 |
| 2026 | 520,059,335 | 5.29% | 27,523,204 |
| 2027 | 547,582,539 | 4.87% | 26,675,768 |
| 2028 | 574,258,308 | 4.45% | 25,558,997 |
| 2029 | 599,817,304 | 4.03% | 24,172,733 |
| 2030 | 623,990,038 | 3.61% | 22,521,348 |
| 2031 | 646,511,386 | 3.19% | 20,613,886 |
| 2032 | 667,125,272 | 2.77% | 18,464,106 |
| 2033 | 685,589,378 | 2.35% | 16,090,399 |
| 2034 | 701,679,777 | 1.93% | 13,515,587 |
| 2035 | 715,195,364 | 1.51% | 10,766,608 |
| 2036 | 725,961,973 | 1.08% | 7,874,074 |
| 2037 | 733,836,047 | 0.95% | 6,971,442 |
| 2038 | 740,807,489 | 0.95% | 7,037,671 |
| 2039 | 747,845,160 | 0.95% | 7,104,529 |
| 2040 | 754,949,689 | 0.95% | 7,172,022 |
| 2041 | 762,121,711 | 0.95% | 7,240,156 |
| 2042 | 769,361,868 | 0.95% | 7,308,938 |
| 2043 | 776,670,805 | 0.95% | 7,378,373 |
| 2044 | 784,049,178 | 0.95% | 7,448,467 |
| 2045 | 791,497,645 | 0.95% | 7,519,228 |
回到这篇帖子的主题，为什么帐号上的SP数量每天都在增长？
之前说过了，新产生的代币将有75%放入奖金池，15%给予每位SP的持有者，10%给予见证人。
新产生的代币将有15%给予每位持有者，我们来算算，如果你持有100SP，每天将会获得多少SP?
目前我们大约有324,074,116 STEEM
通货膨胀率大概8.24%.
一年的通货膨胀获得的SP数量：100SP 0.0824 0.15 = 1.236 SP
一天的通货膨胀获得的SP数量：1.236SP/365 = 0.0034SP
所以你一年啥都不做，SP的数量会自动增长1.236%
之前就有人嘲笑STEEM的这个机制。
自己先预挖了100万个代币，然后每年设置5%的通货膨胀率，什么都不做每年收入5万个代币。
他说的不无道理，但是这不也是普通货币做的事吗？
参考资料
STEEM Whitepaper
THE INFLATION OF STEEM OVER THE NEXT 30 YEARS!
Posted from my blog with SteemPress : http://ericet.vornix.blog/2019/01/03/%e4%b8%ba%e4%bb%80%e4%b9%88%e5%b8%90%e5%8f%b7%e4%b8%8a%e7%9a%84sp%e6%95%b0%e9%87%8f%e6%af%8f%e5%a4%a9%e9%83%bd%e5%9c%a8%e5%a2%9e%e9%95%bf%ef%bc%9f/
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