A BigchainDB use case: Weaving the ILP fabric into BigchainDB
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Dimitri De Jonghe from Ascribe/BigchainDB describes how Interledger provides a powerful logical framework for distributed ledgers. He demonstrates the use of crypto-conditions inside of BigchainDB, making it the first distributed ledger with native interoperability through Interledger.
![{
"id":"933cd83a419d2735822a2154c84176a2f419cbd449a74b94e592ab807af23861",
"transaction":{
"conditions":[{
"cid":0,
"condition":{
"details":{
"bitmask":32,
"public_key":"BwuhqQX8FPsmqYiRV2CSZYWWsSWgSSQQFHjqxKEuqkPs",
"signature":None,
"type":"fulfillment",
"type_id":4
},
"uri":"cc:4:20:oqXTWvR3afHHX8OaOO84kZxS6nH4GEBXD4Vw8Mc5iBo:96"
},
"new_owners":["BwuhqQX8FPsmqYiRV2CSZYWWsSWgSSQQFHjqxKEuqkPs"]
}],
"data":{
"hash":"872fa6e6f46246cd44afdb2ee9cfae0e72885fb0910e2bcf9a5a2a4eadb417b8",
"payload":{"msg":"Hello BigchainDB!"}
},
"fulfillments":[{
"current_owners":["3LQ5dTiddXymDhNzETB1rEkp4mA7fEV1Qeiu5ghHiJm9"],
"fid":0,
"fulfillment":"cf:4:Iq-BcczwraM2UpF-TDPdwK8fQ6IXkD_6uJaxBZd984yx…",
"input":None
}],
"operation":"CREATE",
"timestamp":"1460981667.449279"
},
"version":1
}
Assets with crypto-conditions
condition = cc.Ed25519Fulfillment()
condition.public_key = “BwuhqQ...”
# optionally provide condition structure
condition.to_dict()
condition.condition_uri
fulfillment =
input.conditions[0].from_dict()
fulfillment.sign(message, private_key)
fulfillment.serialize_uri()](https://image.slidesharecdn.com/ilpworkshop-london-6july-weavingtheilpfabricintobigchaindb-160714160126-161027122654/85/A-BigchainDB-use-case-Weaving-the-ILP-fabric-into-BigchainDB-11-320.jpg)
![{
"id":"933cd83a419d2735822a2154c84176a2f419cbd449a74b94e592ab807af23861",
"transaction":{
"conditions":[{
"cid":0,
"condition":{
"details":{
"bitmask":32,
"public_key":"BwuhqQX8FPsmqYiRV2CSZYWWsSWgSSQQFHjqxKEuqkPs",
"signature":None,
"type":"fulfillment",
"type_id":4
},
"uri":"cc:4:20:oqXTWvR3afHHX8OaOO84kZxS6nH4GEBXD4Vw8Mc5iBo:96"
},
"new_owners":["BwuhqQX8FPsmqYiRV2CSZYWWsSWgSSQQFHjqxKEuqkPs"]
}],
"data":{
"hash":"872fa6e6f46246cd44afdb2ee9cfae0e72885fb0910e2bcf9a5a2a4eadb417b8",
"payload":{"msg":"Hello BigchainDB!"}
},
"fulfillments":[{
"current_owners":["3LQ5dTiddXymDhNzETB1rEkp4mA7fEV1Qeiu5ghHiJm9"],
"fid":0,
"fulfillment":"cf:4:Iq-BcczwraM2UpF-TDPdwK8fQ6IXkD_6uJaxBZd984yx…",
"input":None
}],
"operation":"CREATE",
"timestamp":"1460981667.449279"
},
"version":1
}
Transaction malleability
fulfillment =
input.conditions[0].from_dict()
fulfillment.sign(message, private_key)
fulfillment.serialize_uri()](https://image.slidesharecdn.com/ilpworkshop-london-6july-weavingtheilpfabricintobigchaindb-160714160126-161027122654/85/A-BigchainDB-use-case-Weaving-the-ILP-fabric-into-BigchainDB-12-320.jpg)
![Utils for crypto-conditions
JSON/dict serialization:
to_dict(), from_dict()
Queryability of complex branches:
get/update/insert/remove subconditions
get_subcondition_path_for_type(type_id):
…
return subcondition, indices
fulfillment.subconditions[indices[0]]['body']
.subconditions[indices[1]]['body']
.subconditions[indices[2]]['body']](https://image.slidesharecdn.com/ilpworkshop-london-6july-weavingtheilpfabricintobigchaindb-160714160126-161027122654/85/A-BigchainDB-use-case-Weaving-the-ILP-fabric-into-BigchainDB-17-320.jpg)
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A BigchainDB use case: Weaving the ILP fabric into BigchainDB
- 1. Weaving the ILP fabric into BigchainDB Dimitri De Jonghe
- 2. BigchainDB 101 Assets & Crypto-Conditions BigchainDB Ledger Plugin
- 3. Throughput >1,000,000 writes/s ~100,000 transactions/s Latency <100 ms Capacity Petabytes with each node adding 48TB Query Database is fully queryable Scalability Performance increases as nodes are added Decentralization Federated non-anonymous participation
- 4. Blockchain-ify big data Retain big-data performance Ordering of events by PAXOS-like solver Natural ordered log of transactions Add blockchain characteristics Decentralization Federated voting on transactions Group into blocks for speed Immutability Hash on prev. blocks Append only! Assets Digital signatures and other trapdoor functions
- 5. RethinkDB Cluster Architecture BigchainDB Federation Alice Bob Blockchain consensus Byzantine actors -> quorum _________________ Big data consensus RAFT -> strong consistency _________________
- 6. Decentralization of the Cloud Proc’ing FS Dec. DB/Ledger Partly Dec. Apps Proc’ing FS DB Apps Dec. Proc’ing Dec. FS Dec. DB/Ledger Dec. Apps Centralized Partly Decentralized Fully Decentralized
- 7. BigchainDB 101 Assets & Crypto-Conditions BigchainDB Ledger Plugin
- 10. Assets with crypto-conditions Turing completeness private-publickey multi-signatures crypto-conditions smart-contracts
- 11. { "id":"933cd83a419d2735822a2154c84176a2f419cbd449a74b94e592ab807af23861", "transaction":{ "conditions":[{ "cid":0, "condition":{ "details":{ "bitmask":32, "public_key":"BwuhqQX8FPsmqYiRV2CSZYWWsSWgSSQQFHjqxKEuqkPs", "signature":None, "type":"fulfillment", "type_id":4 }, "uri":"cc:4:20:oqXTWvR3afHHX8OaOO84kZxS6nH4GEBXD4Vw8Mc5iBo:96" }, "new_owners":["BwuhqQX8FPsmqYiRV2CSZYWWsSWgSSQQFHjqxKEuqkPs"] }], "data":{ "hash":"872fa6e6f46246cd44afdb2ee9cfae0e72885fb0910e2bcf9a5a2a4eadb417b8", "payload":{"msg":"Hello BigchainDB!"} }, "fulfillments":[{ "current_owners":["3LQ5dTiddXymDhNzETB1rEkp4mA7fEV1Qeiu5ghHiJm9"], "fid":0, "fulfillment":"cf:4:Iq-BcczwraM2UpF-TDPdwK8fQ6IXkD_6uJaxBZd984yx…", "input":None }], "operation":"CREATE", "timestamp":"1460981667.449279" }, "version":1 } Assets with crypto-conditions condition = cc.Ed25519Fulfillment() condition.public_key = “BwuhqQ...” # optionally provide condition structure condition.to_dict() condition.condition_uri fulfillment = input.conditions[0].from_dict() fulfillment.sign(message, private_key) fulfillment.serialize_uri()
- 12. { "id":"933cd83a419d2735822a2154c84176a2f419cbd449a74b94e592ab807af23861", "transaction":{ "conditions":[{ "cid":0, "condition":{ "details":{ "bitmask":32, "public_key":"BwuhqQX8FPsmqYiRV2CSZYWWsSWgSSQQFHjqxKEuqkPs", "signature":None, "type":"fulfillment", "type_id":4 }, "uri":"cc:4:20:oqXTWvR3afHHX8OaOO84kZxS6nH4GEBXD4Vw8Mc5iBo:96" }, "new_owners":["BwuhqQX8FPsmqYiRV2CSZYWWsSWgSSQQFHjqxKEuqkPs"] }], "data":{ "hash":"872fa6e6f46246cd44afdb2ee9cfae0e72885fb0910e2bcf9a5a2a4eadb417b8", "payload":{"msg":"Hello BigchainDB!"} }, "fulfillments":[{ "current_owners":["3LQ5dTiddXymDhNzETB1rEkp4mA7fEV1Qeiu5ghHiJm9"], "fid":0, "fulfillment":"cf:4:Iq-BcczwraM2UpF-TDPdwK8fQ6IXkD_6uJaxBZd984yx…", "input":None }], "operation":"CREATE", "timestamp":"1460981667.449279" }, "version":1 } Transaction malleability fulfillment = input.conditions[0].from_dict() fulfillment.sign(message, private_key) fulfillment.serialize_uri()
- 13. Tracking the story of 3 assets
- 14. Other crypto-conditions BigchainDB supports crypto-conditions natively: ● Hashlocks: Preimage-SHA-256 ● Signatures: Ed25519 ● Threshold: complex branches possible Python version for crypto-conditions @ https://github.com/bigchaindb/cryptoconditions >pip install cryptoconditions
- 15. “Experimental” crypto-conditions BigchainDB append only, how to provide escrow? if timeout_condition.validate(utcnow()): execute_fulfillment.validate(msg) == True abort_fulfillment.validate(msg) == False else: execute_fulfillment.validate(msg) == False abort_fulfillment.validate(msg) == True
- 16. “Experimental” crypto-conditions Timeout-condition now() < expiry_time Inverter if fact == True: output = False
- 17. Utils for crypto-conditions JSON/dict serialization: to_dict(), from_dict() Queryability of complex branches: get/update/insert/remove subconditions get_subcondition_path_for_type(type_id): … return subcondition, indices fulfillment.subconditions[indices[0]]['body'] .subconditions[indices[1]]['body'] .subconditions[indices[2]]['body']
- 18. BigchainDB 101 Assets & Crypto-Conditions BigchainDB Ledger Plugin
- 19. BigchainDB web stack API websocket ilp-plugin-bigchaindb / <your_app>
- 20. BigchainDB Ledger Plugin connect()/disconnect() Connect to a BigchainDB API + websocket getBalance() Retrieve the number of assets for an account send(transfer) Local ledger escrow fulfillCondition(transfer, conditionFulfillment) Fulfill the execute branch of the escrow getConnectors(): <example-specific> Get accounts with multi-ledger connections
- 21. Demo!
- 22. Hackaton Proposals • Challenge: Payment system + Fungible Assets • Idea: Pay as you stream platform – 1 StreamCoin = Y dollars – 1 StreamCoin = X time units of streaming
- 23. When Alice wants to listen to music... Alice $0.5 Escrow 0 StreamCoin 0 StreamCoin 1 Escrow 0 PAYS 0 © Interledger Community