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Contents

  1. Contents
  2. State
  3. Begin Block
  4. Parameters
  5. Events

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State

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Params

  • Params: mint/params -> legacy_amino(params)
protobuf
message Params {
  option (amino.name) = "client/x/mint/Params";

  // type of coin to mint
  string mint_denom = 1;
  // inflation amount per year
  string inflations_per_year = 2 [
    (cosmos_proto.scalar)  = "cosmos.Dec",
    (gogoproto.customtype) = "cosmossdk.io/math.LegacyDec",
    (gogoproto.nullable)   = false
  ];
  // expected blocks per year
  uint64 blocks_per_year = 3;
}

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Begin Block

Minting parameters are calculated and inflation paid at the beginning of each block.

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Inflation amount calculation

Inflation amount is calculated using an “inflation calculation function” that’s
passed to the NewAppModule function. If no function is passed, then the SDK’s default inflation function will be used (DefaultInflationCalculationFn). In case a custom inflation calculation logic is needed, this can be achieved by defining and passing a function that matches InflationCalculationFn’s signature. 
type InflationCalculationFn func(ctx sdk.Context, minter Minter, params Params, bondedRatio math.LegacyDec) math.LegacyDec

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Parameters

The minting module contains the following parameters:
KeyTypeExample
MintDenomstring”stake”
InflationsPerYearstring (dec)“20000000000000000”
BlocksPerYearstring (uint64)“10368000”
  • MintDenom is the coin denominator used.
  • InflationsPerYear is the target inflation per year, in 1e18 decimals.
  • BlocksPerYear is the target number of blocks per year.

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Events

The minting module emits the following events:

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BeginBlocker

TypeAttribute KeyAttribute Value
mintamount”1000”