HTTP API Implementation

[sideninja]

Our new access nodes will support HTTP API in addition to the gRPC API. We believe it would be beneficial if all SDKs will support the HTTP API as well. This is a feature request for supporting the new API.

The Open API specification can be found here: https://github.com/onflow/flow/tree/master/openapi And the documentation can be found: https://docs.onflow.org/http-api/

The new HTTP API is available on testnet (https://rest-testnet.onflow.org/v1/) and mainnet (https://rest-mainnet.onflow.org/v1/).

DoD:

• implementation
• release of the newer version of GoSDK

[sideninja]

Working on implementing the feedback. Renaming the package from client to access requires changes in flow-go as well, so the work is in progress and tracked here https://github.com/onflow/flow-go/issues/2347

[sideninja]

Waiting for the PR to be approved. Ping @psiemens as the last needed approval.

[sideninja]

All the suggestions implemented:

• renaming the client package to access
• removing flow-go dependency and use generate models
• writing migration guide
• adding more tests
• misc

[sideninja]

Done https://github.com/onflow/flow-go-sdk/releases/tag/v0.25.0