Hashgraph 10.0.0

Version 10.0.0 Hedera API Version 0.40.0

Version 10.0.0 includes upgraded gRPC support libraries; support for Moniker (EVM Public Key Address Hash), and more additions from HAPI 0.40. It also includes a new client feature for submitting externally created transactions with the new SubmitExternalTransactionAsync method, a new Gossip Node PingAsync method, enhancements in Private and Public Key import options and optional customized gRPC Channel factories.

Version 10.0.0 also introduces a limited Mirror Node REST API client, MirrorRestClient, for retrieving information such as the list of available Gateways, detailed account information and other useful data. The client is a work in progress and the API surface will change over time, which may cause breaking changes with future versions. Presently it is useful, but not comprehensive.

Breaking Changes

Since the native .NET DateTime object does not provide sufficient time resolution to properly represent an Hedera Consensus Time Stamp, most portions of the API surface area have swapped a new object ConsensusTimeStamp in place of DateTime. This is a sweeping and large change to the SDK. The ConsensusTimeStamp object provides an implicit cast from a DateTime to help aid in the transition from 9.0 sdk versions to 10.0. Be advised: converting a ConsensusTimeStamp to a native DateTime object can cause a loss of information (the HAPI smallest unit of time is the nano seconds, the DateTime’s smallest unit of time is 100 nanoseconds). Additionally, Endorsment has removed the PublicKey property in favor of a new ToBytes() method providing additional options when converting endorsement key values to byte array outputs.