Bart
Hello. I'm using Slides for sharing knowledge about blockchain and miscellaneous projects of mine.
blockchain in practice - part 3
storing data
on a blockchain?
@bartroorda - 13 juni 2018 - border sessions
1. bitcoin
only hashes
references only
not real data
OP_RETURN {80 bytes of data you want}
OP_RETURN {80 bytes of data you want}
80 bytes?!
how to store a PDF then
+
- you have proof of existence
- secured in strongest blockchain
- it works
-
- bit expensive
- only PoE
2. ethereum
gas price per transaction
based on data
easy to store state
not for full documents
example
VotingContract {
votesForAlice: 0,
votesForBob: 5,
votesForCharles: 20,
photoOfVotingSheet: ipfs://img.png
}
small data
3.
decentralized storage
decentralized storage
- Using blockchain as incentive system
- Using blockchain as security system
- Uses distributed storage space off-chain
examples
of decentralized storage
examples
of decentralized storage
As alternative to "everything in a blockchain":
- Peer to peer file storage
- A distributed database
reasons
of decentralized storage
- Efficiency (store it a minimum amount of times)
- Economic (a market place for storage appears)
- Safer (data is not stored at one party)
source & creator of diagram: protoslides
2
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Storing data on a blockchain
By Bart
