a9af2c3fc2
<!-- The default pull request template is for types feat, fix, or refactor. For other templates, add one of the following parameters to the url: - template=docs.md - template=other.md --> ## Description We want to use this feature in [Akash Network](https://akash.network/). The [Akash whitepaper](https://whitepaper.io/document/632/akash-network-whitepaper) defines a time-based function for the inflation: `I(t)`. The way `cosmos-sdk` currently calculates inflation is different as compared to what the Akash whitepaper prescribes. So, we need the `cosmos-sdk` to accept a custom function to calculate inflation. When the custom function isn't provided, it should use the default inflation calculation logic as it currently does. <!-- Add a description of the changes that this PR introduces and the files that are the most critical to review. --> --- ### Author Checklist *All items are required. Please add a note to the item if the item is not applicable and please add links to any relevant follow up issues.* I have... - [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title - [ ] added `!` to the type prefix if API or client breaking change - [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting)) - [ ] provided a link to the relevant issue or specification - [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules) - [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing) - [ ] added a changelog entry to `CHANGELOG.md` - [ ] included comments for [documenting Go code](https://blog.golang.org/godoc) - [ ] updated the relevant documentation or specification - [ ] reviewed "Files changed" and left comments if necessary - [ ] confirmed all CI checks have passed ### Reviewers Checklist *All items are required. Please add a note if the item is not applicable and please add your handle next to the items reviewed if you only reviewed selected items.* I have... - [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title - [ ] confirmed `!` in the type prefix if API or client breaking change - [ ] confirmed all author checklist items have been addressed - [ ] reviewed state machine logic - [ ] reviewed API design and naming - [ ] reviewed documentation is accurate - [ ] reviewed tests and test coverage - [ ] manually tested (if applicable)
56 lines
1.6 KiB
Go
56 lines
1.6 KiB
Go
package mint
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import (
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"time"
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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/keeper"
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"github.com/cosmos/cosmos-sdk/x/mint/types"
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)
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// BeginBlocker mints new tokens for the previous block.
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func BeginBlocker(ctx sdk.Context, k keeper.Keeper, ic types.InflationCalculationFn) {
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defer telemetry.ModuleMeasureSince(types.ModuleName, time.Now(), telemetry.MetricKeyBeginBlocker)
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// fetch stored minter & params
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minter := k.GetMinter(ctx)
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params := k.GetParams(ctx)
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// recalculate inflation rate
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totalStakingSupply := k.StakingTokenSupply(ctx)
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bondedRatio := k.BondedRatio(ctx)
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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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k.SetMinter(ctx, minter)
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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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panic(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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panic(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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}
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