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An SDK for interacting with the Concordium blockchain

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syntax = "proto3";

package concordium.health;

// This specifies the package we want to use for our generated Go code.
// Has no effect on code generated on other languages.
option go_package = "./pb";

// This specifies the package we want to use for our generated Java classes. 
// Has no effect on code generated on other languages.
option java_package = "com.concordium.health";

// This specifies that separate .java files will be generated for each of the Java classes/enums/etc. generated for the top-level messages, services, and enumerations, 
// and the wrapper Java class generated for this .proto file won't contain any nested classes/enums/etc. 
// If not generating Java code, this option has no effect.
option java_multiple_files = true;

// This specifies the package we want to use for our generated C# classes. 
// Has no effect on code generated on other languages.
option csharp_namespace = "Concordium.Health";

// Parameters to the node health query. The default message gives a good
// default.
message NodeHealthRequest {}

// Response to the health check. A return code of "OK" is used for success, and
// errors are handled via RPC status codes
message NodeHealthResponse {}

service Health {
  // Check the health of the node. By necessity this involves a number of
  // heuristics since in a distributed network we have to rely on the local
  // information only and we don't have authoritative data on, e.g., last
  // finalized block.
  //
  // In particular, a node that is not caught up to the head of the chain is not
  // healthy.
  //
  // If possible the client should use other queries to get a more fine-grained
  // understanding of the node health. However this endpoint should provide a
  // reasonable default and is usable in cases where an automatic check is
  // performed that does not allow for configuration, such as in load-balancers.
  rpc Check(NodeHealthRequest) returns (NodeHealthResponse);
}