syntax = "proto3";
package tendermint.proto.types;

option go_package = "github.com/tendermint/tendermint/proto/types";

import "third_party/proto/gogoproto/gogo.proto";
import "google/protobuf/duration.proto";

option (gogoproto.equal_all) = true;

// ConsensusParams contains consensus critical parameters that determine the
// validity of blocks.
message ConsensusParams {
  BlockParams     block     = 1 [(gogoproto.nullable) = false];
  EvidenceParams  evidence  = 2 [(gogoproto.nullable) = false];
  ValidatorParams validator = 3 [(gogoproto.nullable) = false];
}

// BlockParams contains limits on the block size.
message BlockParams {
  // Note: must be greater than 0
  int64 max_bytes = 1;
  // Note: must be greater or equal to -1
  int64 max_gas = 2;
  // Minimum time increment between consecutive blocks (in milliseconds)
  // Not exposed to the application.
  int64 time_iota_ms = 3;
}

// EvidenceParams determine how we handle evidence of malfeasance.
message EvidenceParams {
  // Max age of evidence, in blocks.
  //
  // The basic formula for calculating this is: MaxAgeDuration / {average block
  // time}.
  int64 max_age_num_blocks = 1;

  // Max age of evidence, in time.
  //
  // It should correspond with an app's "unbonding period" or other similar
  // mechanism for handling [Nothing-At-Stake
  // attacks](https://github.com/ethereum/wiki/wiki/Proof-of-Stake-FAQ#what-is-the-nothing-at-stake-problem-and-how-can-it-be-fixed).
  google.protobuf.Duration max_age_duration = 2
      [(gogoproto.nullable) = false, (gogoproto.stdduration) = true];

  // This sets the maximum number of evidence that can be committed in a single block.
  // and should fall comfortably under the max block bytes when we consider the size of
  // each evidence (See MaxEvidenceBytes). The maximum number is MaxEvidencePerBlock.
  // Default is 50
  uint32 max_num = 3;
}

// ValidatorParams restrict the public key types validators can use.
// NOTE: uses ABCI pubkey naming, not Amino names.
message ValidatorParams {
  repeated string pub_key_types = 1;
}

// HashedParams is a subset of ConsensusParams.
// It is amino encoded and hashed into
// the Header.ConsensusHash.
message HashedParams {
  int64 block_max_bytes = 1;
  int64 block_max_gas   = 2;
}