package paychmgr import ( "context" "github.com/filecoin-project/go-address" "github.com/filecoin-project/lotus/chain/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 }