134 lines
5.0 KiB
Go
134 lines
5.0 KiB
Go
package stake
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import (
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"bytes"
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sdk "github.com/cosmos/cosmos-sdk/types"
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)
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// Pool - dynamic parameters of the current state
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type Pool struct {
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LooseUnbondedTokens int64 `json:"loose_unbonded_tokens"` // tokens not associated with any validator
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UnbondedTokens int64 `json:"unbonded_tokens"` // reserve of unbonded tokens held with validators
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UnbondingTokens int64 `json:"unbonding_tokens"` // tokens moving from bonded to unbonded pool
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BondedTokens int64 `json:"bonded_tokens"` // reserve of bonded tokens
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UnbondedShares sdk.Rat `json:"unbonded_shares"` // sum of all shares distributed for the Unbonded Pool
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UnbondingShares sdk.Rat `json:"unbonding_shares"` // shares moving from Bonded to Unbonded Pool
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BondedShares sdk.Rat `json:"bonded_shares"` // sum of all shares distributed for the Bonded Pool
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InflationLastTime int64 `json:"inflation_last_time"` // block which the last inflation was processed // TODO make time
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Inflation sdk.Rat `json:"inflation"` // current annual inflation rate
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DateLastCommissionReset int64 `json:"date_last_commission_reset"` // unix timestamp for last commission accounting reset (daily)
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// Fee Related
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PrevBondedShares sdk.Rat `json:"prev_bonded_shares"` // last recorded bonded shares - for fee calcualtions
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}
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func (p Pool) equal(p2 Pool) bool {
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bz1 := cdcEmpty.MustMarshalBinary(&p)
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bz2 := cdcEmpty.MustMarshalBinary(&p2)
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return bytes.Equal(bz1, bz2)
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}
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// initial pool for testing
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func initialPool() Pool {
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return Pool{
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LooseUnbondedTokens: 0,
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BondedTokens: 0,
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UnbondingTokens: 0,
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UnbondedTokens: 0,
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BondedShares: sdk.ZeroRat(),
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UnbondingShares: sdk.ZeroRat(),
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UnbondedShares: sdk.ZeroRat(),
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InflationLastTime: 0,
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Inflation: sdk.NewRat(7, 100),
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DateLastCommissionReset: 0,
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PrevBondedShares: sdk.ZeroRat(),
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}
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}
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//____________________________________________________________________
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// Sum total of all staking tokens in the pool
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func (p Pool) TokenSupply() int64 {
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return p.LooseUnbondedTokens + p.UnbondedTokens + p.UnbondingTokens + p.BondedTokens
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}
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//____________________________________________________________________
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// get the bond ratio of the global state
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func (p Pool) bondedRatio() sdk.Rat {
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if p.TokenSupply() > 0 {
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return sdk.NewRat(p.BondedTokens, p.TokenSupply())
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}
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return sdk.ZeroRat()
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}
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// get the exchange rate of bonded token per issued share
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func (p Pool) bondedShareExRate() sdk.Rat {
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if p.BondedShares.IsZero() {
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return sdk.OneRat()
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}
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return sdk.NewRat(p.BondedTokens).Quo(p.BondedShares)
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}
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// get the exchange rate of unbonding tokens held in validators per issued share
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func (p Pool) unbondingShareExRate() sdk.Rat {
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if p.UnbondingShares.IsZero() {
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return sdk.OneRat()
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}
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return sdk.NewRat(p.UnbondingTokens).Quo(p.UnbondingShares)
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}
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// get the exchange rate of unbonded tokens held in validators per issued share
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func (p Pool) unbondedShareExRate() sdk.Rat {
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if p.UnbondedShares.IsZero() {
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return sdk.OneRat()
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}
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return sdk.NewRat(p.UnbondedTokens).Quo(p.UnbondedShares)
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}
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//_______________________________________________________________________
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func (p Pool) addTokensUnbonded(amount int64) (p2 Pool, issuedShares PoolShares) {
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issuedSharesAmount := sdk.NewRat(amount).Quo(p.unbondedShareExRate()) // tokens * (shares/tokens)
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p.UnbondedShares = p.UnbondedShares.Add(issuedSharesAmount)
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p.UnbondedTokens += amount
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return p, NewUnbondedShares(issuedSharesAmount)
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}
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func (p Pool) removeSharesUnbonded(shares sdk.Rat) (p2 Pool, removedTokens int64) {
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removedTokens = p.unbondedShareExRate().Mul(shares).Evaluate() // (tokens/shares) * shares
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p.UnbondedShares = p.UnbondedShares.Sub(shares)
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p.UnbondedTokens -= removedTokens
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return p, removedTokens
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}
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func (p Pool) addTokensUnbonding(amount int64) (p2 Pool, issuedShares PoolShares) {
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issuedSharesAmount := sdk.NewRat(amount).Quo(p.unbondingShareExRate()) // tokens * (shares/tokens)
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p.UnbondingShares = p.UnbondingShares.Add(issuedSharesAmount)
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p.UnbondingTokens += amount
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return p, NewUnbondingShares(issuedSharesAmount)
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}
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func (p Pool) removeSharesUnbonding(shares sdk.Rat) (p2 Pool, removedTokens int64) {
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removedTokens = p.unbondingShareExRate().Mul(shares).Evaluate() // (tokens/shares) * shares
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p.UnbondingShares = p.UnbondingShares.Sub(shares)
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p.UnbondingTokens -= removedTokens
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return p, removedTokens
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}
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func (p Pool) addTokensBonded(amount int64) (p2 Pool, issuedShares PoolShares) {
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issuedSharesAmount := sdk.NewRat(amount).Quo(p.bondedShareExRate()) // tokens * (shares/tokens)
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p.BondedShares = p.BondedShares.Add(issuedSharesAmount)
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p.BondedTokens += amount
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return p, NewBondedShares(issuedSharesAmount)
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}
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func (p Pool) removeSharesBonded(shares sdk.Rat) (p2 Pool, removedTokens int64) {
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removedTokens = p.bondedShareExRate().Mul(shares).Evaluate() // (tokens/shares) * shares
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p.BondedShares = p.BondedShares.Sub(shares)
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p.BondedTokens -= removedTokens
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return p, removedTokens
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}
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