| /* | |
| PutCallFlag: Either "put" or "call" | |
| S: Stock Price | |
| X: Strike Price | |
| T: Time to expiration (in years) | |
| r: Risk-free rate | |
| v: Volatility | |
| This is the same one found in http://www.espenhaug.com/black_scholes.html | |
| but written with proper indentation and a === instead of == because it's |
The consensus protocol limits on blocks are:
1 million or fewer bytes canonically-serialized size. 20,000 or fewer "sigops"
Unfortunately, Satoshi implemented those as quick fixes with zero code review and little testing (Bitcoin was not a Big Deal back then, it was the right decision at the time), and the way sigop counting is done is... well, just wrong.
Here's how Satoshi did it, as pseudo-code (see GetLegacySigOpCount in main.cpp for actual code):
For all the transactions in a block:
| # AppDelegate.m | |
| #import <Analytics/SEGAnalytics.h> | |
| [SEGAnalytics setupWithConfiguration:[SEGAnalyticsConfiguration configurationWithWriteKey:@"YOUR_ANALYTICS_KEY_HERE"]]; | |
| # AnalyticsHelper.h | |
| #import "RCTViewManager.h" | |
| #import "RCTBridgeModule.h" |
| Stocks Vs. Bonds | 1926-2003 | 1802-2003 |
|---|---|---|
| Stocks - Annual Rate of Return | 12.7% | 8.3% |
| Bonds - Annual Rate of Return | 5.4% | 4.9% |
| Stocks - Multiplier | 2285x | 8,800,000x |
| Bonds - Multiplier | 61x | 2285x |