Toms Blog

Where I talk about Bitcoin and Technology

Flowee just got easier to build

2018-02-14 bitcoin-cash flowee
Flowee is about helping creators to connect to Bitcoin (BCH). In today’s world we still are missing a lot of very useful components which allow us to integrate Bitcoin into every day life. Creators are the ones coming in and building those solutions. Today I finished a little project (took me almost a week) to upgrade the Flowee the Hub git repository so it can be build using cmake. An action taken after having seen too many people fail at the building step. Continue reading

Bitcoin has always been a platform. Investing in a platform is something society only does if there is opportunity for growth.
BCH has this, BTC doesn’t.

Nobody is claiming BCH is beating BTC in tx volume. What we do say is that it has more developments, interests and sheer growth than any other.

Tom Zander

How Flowee managed to make the wallet rescan speed 10x

2018-02-12 bitcoin cash flowee
In Bitcoin (BCH) a wallet doesn’t store a certain amount, instead it stores all the incoming payments you received before. Much like cash where your wallet stores the bills you received. A side-effect of this design is that if you want to check how much a backed-up paper wallet is worth, the wallet application is required to check for matching transactions in the block-chain. A typical needle in a haystack. The worst case scenario is when you have to rescan the entire history of Bitcoin Cash. Continue reading

Are SPV payments safe?

2018-01-27 bitcoin

There are still a lot of misconceptions out about SPV wallets, people make it seem like they are less useful than they are, and this is a shame.

SPV wallets are wallets with “Simplified Payment Verification”. A term that actually shows up in the original Bitcoin whitepaper from Satoshi Nakamoto.

The trick is that SPV wallets (which in practice is almost all wallets) check all the Bitcoin blocks, validate if the miners did their work but they do not download and check all the transactions. This limits the download and check of the entire 8 year blockchain to about 39 MB. Pretty neat eh?

So, what are people worried about?

Continue reading

Flowee the Hub

2018-01-24 bitcoin flowee
My motivation for working on Bitcoin is actually several decades old. In one of my first jobs we had some consultants visit us explaining all the ins and outs of a retirement plan. As most people young and naive do, I signed up for monthly payments. When less than a year later the company went under I tried to recover the funds paid and to my surprise there was only maybe 10% left of it. Continue reading
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