Opt-in hard-fork without alternate transaction history? IETF’s RFC 7282 is an eloquent document which describes important aspects on koop consensus, and worthwhile if you want a more nuanced interpretation than “widespread agreement and disagreements addressed (even if not acommodated)”. Measuring Consensus Once we have a concrete technical proposal, and it seems to have some traction,… Continue reading Opt-in hard-fork without alternate transaction history?
Author: sjors
Replay Protection in The Blockchain Wars
Replay Protection in The Blockchain Wars First, I’ll let Jimmy Song explain transaction replay attacks: However what this short video doesn’t cover, is that there are multiple levels of replay protection. I believe a lot of anger and confusion stems from not properly understanding this. So I’ll do my best to explain.
Historical Bitcoin Core Client Performance
Historical Bitcoin Core Client Performance After reading about performance optimizations on the Bitcoin Core blog, I wanted to see a chart of that. I couldn’t find one, so I spun up a bunch of EC2 nodes and set out to measure how long it took each new version of the bitcoin core client to sync… Continue reading Historical Bitcoin Core Client Performance
Some books on the economy
Some books on the economy After listening to another unconvincing and — more importantly — unscientific oversimplistic rant about a magical world without government, I decided to post a comment on Youtube! Actually a bunch of them. Maybe I should just write blog posts again… One of the folks I chatted with in the comments is Michael Tidwell from the… Continue reading Some books on the economy
Ford vs. modern day minimum wage and overwork
I finally got around to reading more about what Ford said back in the day. I think it’s an urban legend that doubling peoples pay leads to more consumption and that leads to increased prosperity. Ford seems to have believed this himself, but if you read the article he also points out two other things:… Continue reading Ford vs. modern day minimum wage and overwork
DNB en bitcoins
Het is onwaarschijnlijk dat virtuele valuta’s zoals de bitcoin op afzienbare termijn een bruikbaar alternatief voor het huidige geld zullen worden. DNB – 8 mei 2014 Ik vermoed dat de DNB dit bulletin publiceerde met als voornaamste doel te voorkomen dat Henk en Ingrid al hun spaargeld in bitcoin stoppen met alle mogelijke rampzalige gevolgen… Continue reading DNB en bitcoins
JSON API Authentication using Devise tokens
For an app that I’m working on I want users to be able to create an account and login. The app speaks JSON. I thought this would be trivial with Devise using something like TokenAuthenticatable, but unfortunately that got deprecated without too much information about alternatives. In typical open source euphemism: we have decided to remove TokenAuthenticatable from Devise,… Continue reading JSON API Authentication using Devise tokens
Lijfrente
Ik werd vorig jaar 32, dus als we het kabinet mogen geloven mag ik op m’n 72e met pensioen. De pensioenleeftijd wordt namelijk de komende jaren verhoogd naar 67 en stijgt daarna met de levensverwachting. De levensverwachting voor een man van 65 stijgt volgens het CBS de komende 40 jaar met 5 jaar. In een… Continue reading Lijfrente
Untitled
Stel je bent een startende ZZP’er en je woont zelfstandig in een sociale huurwoning. Je overweegt om een kleine klus van €1.000 aan te nemen. Is het de moeite waard? In de bovenste grafiek zie je hoeveel belasting je betaalt over de inkomsten van die klus. Stel dat je tot nog toe €8.000 verdiend had… Continue reading Untitled
Cars and taxes – Dutch style
I’m writing this in English because the absurd complexity of Dutch tax law is probably more entertaining for foreigners than for locals who are used to it. There’s a chance that I’m going to work at a client’s office in the middle of nowhere for one month. I don’t have a car and public transport… Continue reading Cars and taxes – Dutch style