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adding ipld stuff from hlibs block-propagation branch on core
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| package ipld | ||
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| import ( | ||
| "context" | ||
|
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| "github.com/ipfs/go-cid" | ||
| ipld "github.com/ipfs/go-ipld-format" | ||
|
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| "github.com/celestiaorg/celestia-node/ipld/plugin" | ||
| ) | ||
|
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| // NmtNodeAdder adds ipld.Nodes to the underlying ipld.Batch if it is inserted | ||
| // into an nmt tree | ||
| type NmtNodeAdder struct { | ||
| ctx context.Context | ||
| batch *ipld.Batch | ||
| leaves *cid.Set | ||
| err error | ||
| } | ||
|
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| // NewNmtNodeAdder returns a new NmtNodeAdder with the provided context and | ||
| // batch. Note that the context provided should have a timeout | ||
| // It is not thread-safe. | ||
| func NewNmtNodeAdder(ctx context.Context, batch *ipld.Batch) *NmtNodeAdder { | ||
| return &NmtNodeAdder{ | ||
| batch: batch, | ||
| ctx: ctx, | ||
| leaves: cid.NewSet(), | ||
| } | ||
| } | ||
|
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| // Visit can be inserted into an nmt tree to create ipld.Nodes while computing the root | ||
| func (n *NmtNodeAdder) Visit(hash []byte, children ...[]byte) { | ||
| if n.err != nil { | ||
| return // protect from further visits if there is an error | ||
| } | ||
|
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| id := plugin.MustCidFromNamespacedSha256(hash) | ||
| switch len(children) { | ||
| case 1: | ||
| if n.leaves.Visit(id) { | ||
| n.err = n.batch.Add(n.ctx, plugin.NewNMTLeafNode(id, children[0])) | ||
| } | ||
| case 2: | ||
| n.err = n.batch.Add(n.ctx, plugin.NewNMTNode(id, children[0], children[1])) | ||
| default: | ||
| panic("expected a binary tree") | ||
| } | ||
| } | ||
|
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| // Batch return the ipld.Batch originally provided to the NmtNodeAdder | ||
| func (n *NmtNodeAdder) Batch() *ipld.Batch { | ||
| return n.batch | ||
| } | ||
|
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| // Commit checks for errors happened during Visit and if absent commits data to inner Batch. | ||
| func (n *NmtNodeAdder) Commit() error { | ||
| if n.err != nil { | ||
| return n.err | ||
| } | ||
|
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| return n.batch.Commit() | ||
| } |
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