v0.7.0

Fork status: Hard fork

v0.7.0	Code change	Persistent Store Breaking	Configuration Change
Core service	Yes	Yes	No
Bitcoin microservice	Yes	Yes	No
IPFS microservice	No	No	No

This release breaks backwards compatibility for Core and Bitcoin services. Requires DB reset for Core and Bitcoin service.

Core service

1. Changed anchor string format.
2. Changed DID unique suffix generation algorithm.
3. Removed the need for recovery reveal values.
4. Used commit-reveal chain as operation order instead of strict ledger time.
5. Fixed property casing in operation delta schema.
6. Allowed any key type for non-operation keys.
7. Added barebone CLI for generating operation requests (only create currently).
8. Made API more RESTful.

Bitcoin service

1. Fixed bug that caused potential crash upon restart.
2. Changed max operation count algorithm for value-locked transactions.
3. Fixed DB to store the denormalized quantile values.

v0.6.0

Fork status: Hard fork

v0.6.0	Code change	Persistent Store Breaking	Configuration Change
Core service	Yes	Yes	Yes
Bitcoin microservice	Yes	Yes	Yes
IPFS microservice	Yes	No	No

This is a release that intentionally breaks backwards compatibility. Requires DB reset for Core and Bitcoin services.

Core service

1. CAS file format revamp.
2. JWK key support.

Bitcoin service

1. Proof-of fee support.
2. Fee cap support.
3. Fee staking support.

IPFS service

1. Service now capable of terminating downloads that exceeds max size.

v0.5.0

Protocol effective blockchain time: 1585000

v0.5.0	Protocol Breaking	Persistent Store Breaking	Configuration Change
Core service	Yes	No	No
Bitcoin microservice	Yes	No	No
IPFS microservice	No	No	No

Core service

1. Added support to return the service versions.
2. Added required usage property to public key entries in DID document.
3. Added compression to batch and anchor files.
4. Prevented rollback if current Blockchain time is behind last transaction time.
5. Changed unprotected header in operation requests to be protected.

Bitcoin service

1. Ignored transactions which have multiple OP_RETURN with Sidetree data.

v0.4.1

v0.4.1	Protocol Breaking	Persistent Store Breaking	Configuration Change
Core service	No	No	No
Bitcoin microservice	No	No	No
IPFS microservice	No	No	No

Core service

1. Referenced v0.4.1 of the @decentralized-identity/sidetree library and updated core service code accordingly.

v0.4.0

v0.4.0	Protocol Breaking	Persistent Store Breaking	Configuration Change
Core service	Yes	Yes	Yes
Bitcoin microservice	Yes	Yes	No
IPFS microservice	No	No	No

Core service

1. Implemented protocol upgrade support with backward-compatibility.
2. Replaced JSON patch based DID update mechanism to use strict update payload schema instead.
3. Added numerous error codes for bad operation request responses.
4. Added schema validation for update operation payload.
5. Removed concept of 'operation number' in update operation payload.
6. Added Secp256k1 key check to only allow compressed format.
7. Standardized interface naming.

Bitcoin microservice

1. anchorFileHash property renamed to anchorString in transaction objects returned in API.

v0.3.0

v0.3.0	Protocol Breaking	Persistent Store Breaking	Configuration Change
Core service	Yes	Yes	No
Bitcoin microservice	No	No	Yes
IPFS microservice	No	No	No

Core service

1. Implemented protocol rule of 1 operation per DID per batch.
2. Implemented persistence for operations pending to be batched and anchored.
3. Implemented anchor file schema validation.
4. Implemented caching of blockchain time to improve performance.
5. Merkle root in anchor file is now a multihash.
6. Added logging for every request.

Bitcoin microservice

1. This service now works directly with the official Bitcoin Core client, removed dependency on BCoin.

IPFS microservice

1. Removed versioning in REST API path.

v0.2.0

v0.1.10 -> v0.2.0	Protocol Breaking	Persistent Store Breaking	Major Feature Update/Bug Fix
Core service	Yes	Yes	Yes
Bitcion microservice	Yes	Yes	Yes
IPFS microservice	Yes	Yes	Yes

Core service

1. Added better handling of bad CAS fetch requests.
2. Fixed bugs where transaction rollback is failing when block-reorganization occurs.

Bitcoin microservice

1. Service now depends on Bcoin instead of Bitcore.
2. Fixed bugs where transaction rollback is failing when block-reorganization occurs.
3. Changed the ION transaction prefix from 'ion-test:' to 'ion:' [protocol breaking].

IPFS microservice

1. Added better handling of bad CAS fetch requests.
2. Added max size constraint on Anchor and Batch files.