mint/

README

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x/mint

Contents

• x/mint
  • Contents
  • State
    • Params
  • Begin-Block
    • Inflation amount calculation
  • Parameters
  • Events
    • BeginBlocker

State

Params

The mint module stores its params in state with the prefix of 0x01, it can be updated by authority via specific smart contract.

• Params: mint/params -> legacy_amino(params)

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 = ;
}

Begin-Block

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

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

Parameters

The minting module contains the following parameters:

Key	Type	Example
MintDenom	string	"stake"
InflationsPerYear	string (dec)	"24625000000000000.000000000000000000"
BlocksPerYear	string (uint64)	"6311520"

Events

The minting module emits the following events:

BeginBlocker

Type	Attribute Key	Attribute Value
mint	amount	{amount}