Kwil v0.9

Due to increased useage of the preview branch, we are redefining the v0.9 release scope to allow us to get preview features on a stable release. We are removing the SQL and Procedure pricing from the previous scope. The new scope is below.

Major Features

Long-Running Migrations

v0.9 adds a feature for long-running network migrations, which allows networks to release breaking consensus changes with zero downtime. This allows a new network, based off of the old network, to run while the old network begins shutting down. It uses a conflict resolution mechanism (see option b) to merge state from the old network to the new network. This might present a security issue to some networks, and thus may not be suitable for some use cases.

Peer Filtering

v0.9 adds peer filtering, which gives node operators fine-grained control on who can sync as a peer without the need to set up a VPC. Nodes can be configured to only allow peers that are (any of the following):

• network validators
• a candidate for being a network validator that the node has voted in favor of.
• on a preconfigured whitelist
• manually added via kwil-admin while the node is running

Kwil Testing Framework

v0.9 adds a framework for testing Kuneiform schemas and precompiles. It allows users to write tests as JSON and run them using kwil-cli. Alternatively, users can run the tests in Go with custom functions that give more fine-grained control over the test cases.

Hook Extensions

v0.9 adds a new type of extension: hooks. Currently, there are two hooks:

• Genesis Hooks: a function that is called exactly once in the lifetime of a network at the end of the genesis block.
• End Block Hooks: a function that is called at the end of each block.

While the use cases for these are wide-ranging, the primary use case is to allow for Kuneiform schemas to be included as part of a network's core functionality (e.g. to be written to by an oracle).

Minor Features and Developments

• A Kuneiform language server Kuneiform extension
• Metrics measuring network throughput for various transaction and block sizes
• Bug fixes for decimal and uint256 encoding and marshalling/unmarshalling
• Kuneiform bug fixes and improvements:
  • added parse_unix_timestamp and format_unix_timestamp functions
  • added a notice function for logging within a procedure
  • added a generate_dbid function for generating dbids within a procedure
  • added @authenticator contextual variable which says the authenticator type that was used
  • added @foreign_caller contextual variable which says which schema called the current procedure (if any)
  • added @block_timestamp which includes the timestamp provided by the CometBFT block proposer
  • Changed Kuneiform operator precedence to more intuitively match other languages
  • blob columns support min_len and max_len
  • uint256 and decimal columns support min and max
  • Foreign key violations return position info
• [removed] REST endpoints