assets: add rpc server

Author: sputn1ck

assets/server.go

@@ -0,0 +1,126 @@
+package assets
+
+import (
+	"context"
+
+	clientrpc "github.com/lightninglabs/loop/looprpc"
+	"github.com/lightninglabs/loop/swapserverrpc"
+	"github.com/lightninglabs/taproot-assets/taprpc/universerpc"
+)
+
+type AssetsClientServer struct {
+	manager *AssetsSwapManager
+
+	clientrpc.UnimplementedAssetsClientServer
+}
+
+func NewAssetsServer(manager *AssetsSwapManager) *AssetsClientServer {
+	return &AssetsClientServer{
+		manager: manager,
+	}
+}
+
+func (a *AssetsClientServer) SwapOut(ctx context.Context,
+	req *clientrpc.SwapOutRequest) (*clientrpc.SwapOutResponse, error) {
+
+	swap, err := a.manager.NewSwapOut(
+		ctx, req.Amt, req.Asset,
+	)
+	if err != nil {
+		return nil, err
+	}
+	return &clientrpc.SwapOutResponse{
+		SwapStatus: &clientrpc.AssetSwapStatus{
+			SwapHash:   swap.SwapOut.SwapHash[:],
+			SwapStatus: string(swap.SwapOut.State),
+		},
+	}, nil
+}
+
+func (a *AssetsClientServer) ListAssetSwaps(ctx context.Context,
+	_ *clientrpc.ListAssetSwapsRequest) (*clientrpc.ListAssetSwapsResponse,
+	error) {
+
+	swaps, err := a.manager.ListSwapOutoutputs(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	rpcSwaps := make([]*clientrpc.AssetSwapStatus, 0, len(swaps))
+	for _, swap := range swaps {
+		rpcSwaps = append(rpcSwaps, &clientrpc.AssetSwapStatus{
+			SwapHash:   swap.SwapHash[:],
+			SwapStatus: string(swap.State),
+		})
+	}
+
+	return &clientrpc.ListAssetSwapsResponse{
+		SwapStatus: rpcSwaps,
+	}, nil
+}
+
+func (a *AssetsClientServer) ClientListAvailableAssets(ctx context.Context,
+	req *clientrpc.ClientListAvailableAssetsRequest,
+) (*clientrpc.ClientListAvailableAssetsResponse, error) {
+
+	assets, err := a.manager.cfg.ServerClient.ListAvailableAssets(
+		ctx, &swapserverrpc.ListAvailableAssetsRequest{},
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	availableAssets := make([]*clientrpc.Asset, 0, len(assets.Assets))
+
+	for _, asset := range assets.Assets {
+		clientAsset := &clientrpc.Asset{
+			AssetId:     asset.AssetId,
+			SatsPerUnit: asset.CurrentSatsPerAssetUnit,
+			Name:        "Asset unknown in known universes",
+		}
+		universeRes, err := a.manager.cfg.AssetClient.QueryAssetRoots(
+			ctx, &universerpc.AssetRootQuery{
+				Id: &universerpc.ID{
+					Id: &universerpc.ID_AssetId{
+						AssetId: asset.AssetId,
+					},
+					ProofType: universerpc.ProofType_PROOF_TYPE_ISSUANCE,
+				},
+			},
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		if universeRes.IssuanceRoot != nil {
+			clientAsset.Name = universeRes.IssuanceRoot.AssetName
+		}
+
+		availableAssets = append(availableAssets, clientAsset)
+	}
+
+	return &clientrpc.ClientListAvailableAssetsResponse{
+		AvailableAssets: availableAssets,
+	}, nil
+}
+func (a *AssetsClientServer) ClientGetAssetSwapOutQuote(ctx context.Context,
+	req *clientrpc.ClientGetAssetSwapOutQuoteRequest,
+) (*clientrpc.ClientGetAssetSwapOutQuoteResponse, error) {
+
+	// Get the quote from the server.
+	quoteRes, err := a.manager.cfg.ServerClient.QuoteAssetLoopOut(
+		ctx, &swapserverrpc.QuoteAssetLoopOutRequest{
+			Amount: req.Amt,
+			Asset:  req.Asset,
+		},
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &clientrpc.ClientGetAssetSwapOutQuoteResponse{
+		SwapFee:     quoteRes.SwapFeeRate,
+		PrepayAmt:   quoteRes.FixedPrepayAmt,
+		SatsPerUnit: quoteRes.CurrentSatsPerAssetUnit,
+	}, nil
+}