lotus/paychmgr/util.go

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2020-08-18 15:27:00 +00:00
package paychmgr
import (
"context"
"github.com/filecoin-project/go-address"
"github.com/filecoin-project/specs-actors/actors/builtin/paych"
)
type BestSpendableAPI interface {
PaychVoucherList(context.Context, address.Address) ([]*paych.SignedVoucher, error)
PaychVoucherCheckSpendable(context.Context, address.Address, *paych.SignedVoucher, []byte, []byte) (bool, error)
}
func BestSpendableByLane(ctx context.Context, api BestSpendableAPI, ch address.Address) (map[uint64]*paych.SignedVoucher, error) {
vouchers, err := api.PaychVoucherList(ctx, ch)
if err != nil {
return nil, err
}
bestByLane := make(map[uint64]*paych.SignedVoucher)
for _, voucher := range vouchers {
spendable, err := api.PaychVoucherCheckSpendable(ctx, ch, voucher, nil, nil)
if err != nil {
return nil, err
}
if spendable {
if bestByLane[voucher.Lane] == nil || voucher.Amount.GreaterThan(bestByLane[voucher.Lane].Amount) {
bestByLane[voucher.Lane] = voucher
}
}
}
return bestByLane, nil
}