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Package blockchain
Short Description Blockchain
License MIT
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Informations about the package blockchain
Blockchain (beta)
A Blockchain database suitable for both private or public blockchains.
- Blocks are stored with transactions as JSON so they are very portable
- Database has been designed to handle large amounts of Blocks and can be quickly synced across multiple servers (if required)
- Transactions are encoded in a Merkle Tree, any attempt to change the transaction will be detected and duplicate transactions submitted in other blocks can also be detected.
- Proof of work can be disabled for private blockchains to remove unnecessary and cumbersome calculations
- It is very fast, you can search for the furthest away hash in the index of 2 million blocks in 0.44 seconds (2012 laptop)
Trying it out
I have included demo.php which will create a Blockchain with Blocks and Transactions
Clone the source code to a directory
Run composer install
Then run the demo script
Create
To create a Blockchain instance, provide a path to where data for that Blockchain will be stored.
For a private Blockchain, set difficulty to 0, since no proof of work is required.
The Blockchain is created when you add the first Block of Transactions.
Create a Transaction object and pass the data to the constructor.
Create a Block and add a Transaction to it, you can add as many Transactions as you need for
each Block.
To add the Block to the Blockchain
Finding Blocks
To get a Block provide the block number
You can also search by hash
To get the most recent Block
Counting
To count the number of Blocks in the Blockchain
List
To get a list of hashes of the most recent X Blocks with the Block number.
To list a custom amount of Blocks
All
To go through all Blocks in the Blockchain, use the all method which yeilds each Block so that it can be done in a memory efficient manner.
The following options can be used
- start: default:0 from which block number
- finish: default:[last block] to which block number
- reverse: default: true. Goes through Blocks starting at the most recent block if set
Validating the Blockchain
On my 2012 Mac Book it took me approx 9 minutes to validate a Blockchain with 1.2 million Blocks and roughly 6 million Transactions.
To validate the entire Blockchain.
Todo
I am thinking the following:
- [ ] If the first set of transactions should define the schema going forward of all future transactions.
- [ ] maybe an encrypted Blockchain could be interesting for private Blockchains to protect data
