54 lines
1.6 KiB
Go
54 lines
1.6 KiB
Go
package datacap
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import (
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"golang.org/x/xerrors"
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"github.com/filecoin-project/go-address"
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"github.com/filecoin-project/go-state-types/abi"
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"github.com/filecoin-project/go-state-types/big"
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"github.com/filecoin-project/go-state-types/builtin/v9/datacap"
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"github.com/filecoin-project/lotus/chain/actors"
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"github.com/filecoin-project/lotus/chain/actors/adt"
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)
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// taking this as a function instead of asking the caller to call it helps reduce some of the error
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// checking boilerplate.
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//
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// "go made me do it"
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type rootFunc func() (adt.Map, error)
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func getDataCap(store adt.Store, ver actors.Version, root rootFunc, addr address.Address) (bool, abi.StoragePower, error) {
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if addr.Protocol() != address.ID {
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return false, big.Zero(), xerrors.Errorf("can only look up ID addresses")
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}
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vh, err := root()
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if err != nil {
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return false, big.Zero(), xerrors.Errorf("loading datacap actor: %w", err)
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}
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var dcap abi.StoragePower
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if found, err := vh.Get(abi.AddrKey(addr), &dcap); err != nil {
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return false, big.Zero(), xerrors.Errorf("looking up addr: %w", err)
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} else if !found {
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return false, big.Zero(), nil
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}
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return true, big.Div(dcap, datacap.DatacapGranularity), nil
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}
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func forEachCap(store adt.Store, ver actors.Version, root rootFunc, cb func(addr address.Address, dcap abi.StoragePower) error) error {
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vh, err := root()
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if err != nil {
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return xerrors.Errorf("loading verified clients: %w", err)
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}
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var dcap abi.StoragePower
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return vh.ForEach(&dcap, func(key string) error {
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a, err := address.NewFromBytes([]byte(key))
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if err != nil {
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return err
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}
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return cb(a, big.Div(dcap, datacap.DatacapGranularity))
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})
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}
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