81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
package keeper
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import (
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"github.com/cosmos/cosmos-sdk/telemetry"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/x/mint/types"
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)
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// MintFn defines the function that needs to be implemented in order to customize the minting process.
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type MintFn func(ctx sdk.Context, k *Keeper) error
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// MintFn runs the mintFn of the keeper.
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func (k *Keeper) MintFn(ctx sdk.Context) error {
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return k.mintFn(ctx, k)
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}
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// DefaultMintFn returns a default mint function.
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// The default MintFn has a requirement on staking as it uses bond to calculate inflation.
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func DefaultMintFn(ic types.InflationCalculationFn) MintFn {
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return func(ctx sdk.Context, k *Keeper) error {
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// fetch stored minter & params
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minter, err := k.Minter.Get(ctx)
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if err != nil {
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return err
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}
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params, err := k.Params.Get(ctx)
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if err != nil {
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return err
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}
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// recalculate inflation rate
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totalStakingSupply, err := k.StakingTokenSupply(ctx)
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if err != nil {
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return err
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}
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bondedRatio, err := k.BondedRatio(ctx)
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if err != nil {
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return err
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}
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minter.Inflation = ic(ctx, minter, params, bondedRatio)
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minter.AnnualProvisions = minter.NextAnnualProvisions(params, totalStakingSupply)
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if err = k.Minter.Set(ctx, minter); err != nil {
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return err
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}
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// mint coins, update supply
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mintedCoin := minter.BlockProvision(params)
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mintedCoins := sdk.NewCoins(mintedCoin)
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err = k.MintCoins(ctx, mintedCoins)
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if err != nil {
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return err
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}
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// send the minted coins to the fee collector account
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err = k.AddCollectedFees(ctx, mintedCoins)
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if err != nil {
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return err
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}
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if mintedCoin.Amount.IsInt64() {
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defer telemetry.ModuleSetGauge(types.ModuleName, float32(mintedCoin.Amount.Int64()), "minted_tokens")
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}
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ctx.EventManager().EmitEvent(
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sdk.NewEvent(
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types.EventTypeMint,
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sdk.NewAttribute(types.AttributeKeyBondedRatio, bondedRatio.String()),
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sdk.NewAttribute(types.AttributeKeyInflation, minter.Inflation.String()),
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sdk.NewAttribute(types.AttributeKeyAnnualProvisions, minter.AnnualProvisions.String()),
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sdk.NewAttribute(sdk.AttributeKeyAmount, mintedCoin.Amount.String()),
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),
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)
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return nil
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}
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}
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