#rounding error

Bug in Solana Token Lending Contract Fixed, More Than $2 Billion Made Exploitable

A bug in the token lending contract of the Solana Program Library (SPL) was recently found and fixed by Neodyme, a security auditing firm. The bug, that was discovered a couple of months back, could have affected several decentralized finance protocols holding more than $2 billion in total value locked (TVL). Their team identified the possible protocols using this contract (or derivatives of it)…

Rounding numbers up or down-whether that 0.5 is a 0 or a 1-is extremely important.

In the science fiction setting of Warhammer 40K, entire worlds are lost due to rounding errors.

At work in Philip Morris, there was a deep anxiety over how to resolve a difference in rounding between two procedures that were at odds with each other.

I’ve studied a hard science degree (chemistry), and I deal with technical measures everyday, and so I have to round off a lot of numbers (because 0.457914 doesn’t really fit on a technical data sheet, you know?)

And always, always, how to handle a .5 is a source of great concern.

In one of my textbooks, flipping a coin was suggested as a way of resolving this issue.

From 0 to 4? Round down. From 6 to 9? Round up.

5? Abandon hope all ye who enter here.

WHY ARE PEOPLE SO FUCKING STUPID

There is a simple way to resolve all rounding disputes, that can easily be reached by logic and common sense.

Arabic numerals have ten symbols, 0 1 2 3 4 5 6 7 8 9

Divide ten in two and you have five. 

The first five symbols - 0 1 2 3 4 - make you round down. The latter five - 5 6 7 8 9 - make you round up. 

Easy.

I’ve seen people with Doctorate’s and Master’s degrees get tripped up over this stupidity. Why.

Church: Movement? What kind of movement?

Tucker: Hey, Church!

Church: Um… *clears throat* Just, uh, ignore him. Uh, I’m actually a computer program that’s been reincarnated in the memory of –

Tucker: Church!!

Church: I’m actually a computer program –

Tucker: Hey Church!!

Church: That’s been reincarnated in the memory of a –

Tucker: Where are you?!

Church: Okay, let me just start over. I-I’m just going to take, uh, I’m just going to go back to the beginning.

Tucker: Church!!!

Church: Hi –

Tucker: Church!!!

Church: My name is Leonard Church –

Tucker: Church!!!

Church: But nobody calls me that –

Tucker: Hey Church!! Come on!!!!

Church: *growls* GODDAMMIT IT, WHAT?! WHAT DO YOU WANT?!?!

Tucker: Come on!! Get up here!!!

Waiting with wand in hand beside the Fat Lady's Portrait, entrance to Gryffindor Tower, Lily eased a snarl from her hair thoughtfully. She wrinkled her nose at herself, took her hand from her hair, and leaned against the wall beside the frame. She hoped she wasn't really early.

Much as she had prepared herself for a return to school without the best friend she'd always had, she was having a weird time of it already, learning how to go to Hogwarts like this, and when she had left her dorm to meet up for rounds that night, to be honest, Lily was a little eager. She had always gotten something particular out of preforming her duties as a Prefect; she liked to be out and about a little after curfew, and she liked to be doing something helpful for her school.

Lily hadn't had the most encouraging sort of day, all spilled cups of water and botched color-changing charms. She was a little off this evening, too, but she knew what she was doing as Prefect and she thought it might get her back into shape, so she wanted to get right to it this year.

She smiled to see her fellow Gryffindor Sixth Year Prefect arrive; the work suited her, yes, and the company wouldn't be so bad either. She and Remus Lupin had their differences - mainly in the sort of company he was willing to keep; Lily was less given than she suspected he might be to say, turning into a wolf during full moons, but that wasn't the sort of difference to stop a friendship - but at this point she rather considered him a mate, and, the two having brewed a Potion together that day in class, she had no less than four topics she wanted to go over with him tonight. Maybe she could catch her stride.

"'Lo, Lupin," Lily said, pushing away from the wall and slipping her wand into her pocket, stumbling briefly, not physically but internally, on the uneven ground of a memory she then felt silly for associating. It was over quickly - already she was picking up a habit of not dwelling.