6.2 KiB
Messages
MsgSetWithdrawAddress
By default a withdrawal address is delegator address. If a delegator wants to change it's
withdrawal address it must send MsgSetWithdrawAddress.
+++ https://github.com/cosmos/cosmos-sdk/blob/v0.40.0/proto/cosmos/distribution/v1beta1/tx.proto#L29-L37
func (k Keeper) SetWithdrawAddr(ctx sdk.Context, delegatorAddr sdk.AccAddress, withdrawAddr sdk.AccAddress) error
if k.blockedAddrs[withdrawAddr.String()] {
fail with "`{withdrawAddr}` is not allowed to receive external funds"
}
if !k.GetWithdrawAddrEnabled(ctx) {
fail with `ErrSetWithdrawAddrDisabled`
}
k.SetDelegatorWithdrawAddr(ctx, delegatorAddr, withdrawAddr)
MsgWithdrawDelegatorReward
under special circumstances a delegator may wish to withdraw rewards from only a single validator.
+++ https://github.com/cosmos/cosmos-sdk/blob/v0.40.0/proto/cosmos/distribution/v1beta1/tx.proto#L42-L50
func WithdrawDelegationReward(delegatorAddr, validatorAddr, withdrawAddr sdk.AccAddress)
height = GetHeight()
// get all distribution scenarios
pool = staking.GetPool()
feePool = GetFeePool()
delInfo = GetDelegationDistInfo(delegatorAddr,
validatorAddr)
valInfo = GetValidatorDistInfo(validatorAddr)
validator = GetValidator(validatorAddr)
feePool, withdraw = delInfo.WithdrawRewards(feePool, valInfo, height, pool.BondedTokens,
validator.Tokens, validator.DelegatorShares, validator.Commission)
SetFeePool(feePool)
SendCoins(distributionModuleAcc, withdrawAddr, withdraw.TruncateDecimal())
Withdraw Validator Rewards All
When a validator wishes to withdraw their rewards it must send
array of MsgWithdrawDelegatorReward. Note that parts of this transaction logic are also
triggered each with any change in individual delegations, such as an unbond,
redelegation, or delegation of additional tokens to a specific validator. This
transaction withdraws the validators commission fee, as well as any rewards
earning on their self-delegation.
func WithdrawValidatorRewardsAll(operatorAddr, withdrawAddr sdk.AccAddress)
height = GetHeight()
feePool = GetFeePool()
pool = GetPool()
ValInfo = GetValidatorDistInfo(delegation.ValidatorAddr)
validator = GetValidator(delegation.ValidatorAddr)
// withdraw self-delegation
withdraw = GetDelegatorRewardsAll(validator.OperatorAddr, height)
// withdrawal validator commission rewards
feePool, commission = valInfo.WithdrawCommission(feePool, valInfo, height, pool.BondedTokens,
validator.Tokens, validator.Commission)
withdraw += commission
SetFeePool(feePool)
SendCoins(distributionModuleAcc, withdrawAddr, withdraw.TruncateDecimal())
Common calculations
Update total validator accum
The total amount of validator accum must be calculated in order to determine the amount of pool tokens which a validator is entitled to at a particular block. The accum is always additive to the existing accum. This term is to be updated each time rewards are withdrawn from the system.
func (g FeePool) UpdateTotalValAccum(height int64, totalBondedTokens Dec) FeePool
blocks = height - g.TotalValAccumUpdateHeight
g.TotalValAccum += totalDelShares * blocks
g.TotalValAccumUpdateHeight = height
return g
Update validator's accums
The total amount of delegator accum must be updated in order to determine the amount of pool tokens which each delegator is entitled to, relative to the other delegators for that validator. The accum is always additive to the existing accum. This term is to be updated each time a withdrawal is made from a validator.
func (vi ValidatorDistInfo) UpdateTotalDelAccum(height int64, totalDelShares Dec) ValidatorDistInfo
blocks = height - vi.TotalDelAccumUpdateHeight
vi.TotalDelAccum += totalDelShares * blocks
vi.TotalDelAccumUpdateHeight = height
return vi
FeePool pool to validator pool
Every time a validator or delegator executes a withdrawal or the validator is the proposer and receives new tokens, the relevant validator must move tokens from the passive global pool to their own pool. It is at this point that the commission is withdrawn
func (vi ValidatorDistInfo) TakeFeePoolRewards(g FeePool, height int64, totalBonded, vdTokens, commissionRate Dec) (
vi ValidatorDistInfo, g FeePool)
g.UpdateTotalValAccum(height, totalBondedShares)
// update the validators pool
blocks = height - vi.FeePoolWithdrawalHeight
vi.FeePoolWithdrawalHeight = height
accum = blocks * vdTokens
withdrawalTokens := g.Pool * accum / g.TotalValAccum
commission := withdrawalTokens * commissionRate
g.TotalValAccum -= accumm
vi.PoolCommission += commission
vi.PoolCommissionFree += withdrawalTokens - commission
g.Pool -= withdrawalTokens
return vi, g
Delegation reward withdrawal
For delegations (including validator's self-delegation) all rewards from reward pool have already had the validator's commission taken away.
func (di DelegationDistInfo) WithdrawRewards(g FeePool, vi ValidatorDistInfo,
height int64, totalBonded, vdTokens, totalDelShares, commissionRate Dec) (
di DelegationDistInfo, g FeePool, withdrawn DecCoins)
vi.UpdateTotalDelAccum(height, totalDelShares)
g = vi.TakeFeePoolRewards(g, height, totalBonded, vdTokens, commissionRate)
blocks = height - di.WithdrawalHeight
di.WithdrawalHeight = height
accum = delegatorShares * blocks
withdrawalTokens := vi.Pool * accum / vi.TotalDelAccum
vi.TotalDelAccum -= accum
vi.Pool -= withdrawalTokens
vi.TotalDelAccum -= accum
return di, g, withdrawalTokens
Validator commission withdrawal
Commission is calculated each time rewards enter into the validator.
func (vi ValidatorDistInfo) WithdrawCommission(g FeePool, height int64,
totalBonded, vdTokens, commissionRate Dec) (
vi ValidatorDistInfo, g FeePool, withdrawn DecCoins)
g = vi.TakeFeePoolRewards(g, height, totalBonded, vdTokens, commissionRate)
withdrawalTokens := vi.PoolCommission
vi.PoolCommission = 0
return vi, g, withdrawalTokens