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feat(bitswap): convert to serial walk in style of UnixFS.Get #36

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feat(bitswap): convert to serial walk in style of UnixFS.Get #36

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24 changes: 23 additions & 1 deletion testbed/testbed/utils/bitswap.go
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Original file line number Diff line number Diff line change
Expand Up @@ -128,8 +128,30 @@ func (n *BitswapNode) EmitMetrics(recorder MetricsRecorder) error {
return err
}

// completely serialized walk, similar to traversing with unixfs file
func serialWalk(ctx context.Context, c cid.Cid, ng ipld.NodeGetter) error {
nd, err := ng.Get(ctx, c)
if err != nil {
return err
}

return walkChildren(ctx, nd, ng)
}

func walkChildren(ctx context.Context, nd ipld.Node, ng ipld.NodeGetter) error {
for _, lnk := range nd.Links() {
err := serialWalk(ctx, lnk.Cid, ng)
if err != nil {
return err
}
}

return nil
}

func (n *BitswapNode) Fetch(ctx context.Context, c cid.Cid, _ []PeerInfo) (files.Node, error) {
err := merkledag.FetchGraph(ctx, c, n.dserv)
ng := merkledag.NewSession(ctx, n.dserv)
err := serialWalk(ctx, c, ng)
if err != nil {
return nil, err
}
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