Page Comparison

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Microservices Application Pattern

Please see the example applications developed by Chris Richardson. These examples on Github illustrate various aspects of the microservice architecture.

Resulting Context

Benefits

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1. 2 parties complete an atomic swap of asset 1 for asset 2 without risk
2. contract config defines terms of the swap
3. if swap can't meet completion criteria, swap transaction is reversed for all parties returning initial states for each
4. optionally, a 3rd party notary service may need to approve the transaction
5. optionally, a 3rd party observer service may record the transaction
6. optionally, the 2 parties may be on different networks

model

a chain manager ( on a chain ) for other chain transactions ?? ( or a configurable chain model ? )

specific validators only for that transaction type and parties are active

1. define multi-step transaction types
2. create transaction instance using the shared transaction manager with workflow from the contract config for that transaction type
3. each transaction has a unique ID
4. set the parties who validate the transaction on each ledger
5. contract takes control over both assets from each party using locks and confirms locks ( if funds or asset limited, policy may allow partial transactions )
6. after each step, the contract instance is updated for both parties and confirmed
7. signatures and consents required by all parties for each step
8. state changes are validated  as complete on each ledger for the current step before moving to next step - 100% endorsement of each update by relevant parties
9. if completion criteria for a step not fulfilled by X time, the transaction is cancelled and all parties are restored to initial states
10. completion messages recorded and events published on success or failure of the transaction

context

assume 2 different orgs on 2 different blockchains on 2 different platforms want to execute a sale using an order (any type of asset )

a blockchain with 2 parties as nodes each running a ledger copy and a contract

blockchains implement escrow transaction interface services in a smart contract

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