The document discusses blockchain databases and platforms. It lists several blockchain platforms including Ethereum, MultiChain, OpenChain, Eris, HydraChain, Lisk, Stratis, Waves, Nem, and HyperLedger. It describes how blockchain databases contain blocks that hold batches of valid transactions encoded in a Merkle tree, with each block containing the hash of the prior block. The document also defines smart contracts as programs that execute autonomously and transparently in a way that cannot be reverted, with their execution trace being public and immutable. It introduces BigChainDB as a blockchain database that combines blockchain and big data features such as immutability, decentralization, assets, high throughput, low latency, high

1. Blockchain – Databases
Study about Databases and platforms related to Blockchain.
Zeeshan Jan

2. Blockchain Platforms
• Ethereum Project ( https://www.ethereum.org/ )
• MultiChain ( http://www.multichain.com )
• OpenChain (https://www.openchain.org/ )
• Eris ( http://www.erisindustries.com )
• HydraChain ( http://www.hydrachain.com )
• Lisk ( https://lisk.io )
• Stratis ( https://stratisplatform.com/ )
• Waves ( https://wavesplatform.com/ )
• Nem ( https://www.nem.io )
• HyperLedger ( https://www.hyperledger.org/ )
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3. Blockchain Databases
• Contains two kinds of records.
1. Blocks
2. Transactions
• Blocks hold batches of valid transactions
that are hashed and encoded into
a Merkle tree.
• Each block holds the hash of prior block.
• Data stored on blockchain is generally
considered incorruptible.
• Smart Contracts
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4. Smart Contracts
A smart contract is a program which execution is
autonomous and totally transparent.
This execution cannot be reverted and its trace is
public & immutable.
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5. Blockchain Database – BigChain DB
Blockchain + Big Data
• Immutability
• Decentralized Control
• Assets
• High Throughput
• Low Latency
• High Capacity
• Rich Permissions
• Query Capabilities
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