67 lines
2.7 KiB
Go
67 lines
2.7 KiB
Go
package retrievaladapter
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import (
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"context"
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"github.com/filecoin-project/go-address"
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"github.com/filecoin-project/go-fil-markets/retrievalmarket"
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"github.com/filecoin-project/go-fil-markets/shared"
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"github.com/filecoin-project/specs-actors/actors/abi"
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"github.com/filecoin-project/specs-actors/actors/builtin/paych"
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"github.com/filecoin-project/lotus/node/impl/full"
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payapi "github.com/filecoin-project/lotus/node/impl/paych"
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"github.com/filecoin-project/lotus/paychmgr"
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)
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type retrievalClientNode struct {
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chainapi full.ChainAPI
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pmgr *paychmgr.Manager
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payapi payapi.PaychAPI
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}
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// NewRetrievalClientNode returns a new node adapter for a retrieval client that talks to the
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// Lotus Node
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func NewRetrievalClientNode(pmgr *paychmgr.Manager, payapi payapi.PaychAPI, chainapi full.ChainAPI) retrievalmarket.RetrievalClientNode {
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return &retrievalClientNode{pmgr: pmgr, payapi: payapi, chainapi: chainapi}
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}
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// GetOrCreatePaymentChannel sets up a new payment channel if one does not exist
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// between a client and a miner and ensures the client has the given amount of
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// funds available in the channel.
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func (rcn *retrievalClientNode) GetOrCreatePaymentChannel(ctx context.Context, clientAddress address.Address, minerAddress address.Address, clientFundsAvailable abi.TokenAmount, tok shared.TipSetToken) (address.Address, error) {
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// TODO: respect the provided TipSetToken (a serialized TipSetKey) when
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// querying the chain
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paych, _, err := rcn.pmgr.GetPaych(ctx, clientAddress, minerAddress, clientFundsAvailable)
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return paych, err
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}
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// Allocate late creates a lane within a payment channel so that calls to
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// CreatePaymentVoucher will automatically make vouchers only for the difference
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// in total
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func (rcn *retrievalClientNode) AllocateLane(paymentChannel address.Address) (uint64, error) {
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return rcn.pmgr.AllocateLane(paymentChannel)
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}
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// CreatePaymentVoucher creates a new payment voucher in the given lane for a
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// given payment channel so that all the payment vouchers in the lane add up
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// to the given amount (so the payment voucher will be for the difference)
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func (rcn *retrievalClientNode) CreatePaymentVoucher(ctx context.Context, paymentChannel address.Address, amount abi.TokenAmount, lane uint64, tok shared.TipSetToken) (*paych.SignedVoucher, error) {
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// TODO: respect the provided TipSetToken (a serialized TipSetKey) when
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// querying the chain
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voucher, err := rcn.payapi.PaychVoucherCreate(ctx, paymentChannel, amount, lane)
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if err != nil {
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return nil, err
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}
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return voucher, nil
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}
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func (rcn *retrievalClientNode) GetChainHead(ctx context.Context) (shared.TipSetToken, abi.ChainEpoch, error) {
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head, err := rcn.chainapi.ChainHead(ctx)
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if err != nil {
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return nil, 0, err
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}
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return head.Key().Bytes(), head.Height(), nil
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}
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