/
main.go
101 lines (87 loc) · 2.19 KB
/
main.go
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package main
import (
"bytes"
"fmt"
"io"
"os"
"github.com/ipfs/go-blockservice"
"github.com/ipfs/go-cid"
"github.com/ipfs/go-cidutil"
"github.com/ipfs/go-merkledag"
chunker "github.com/ipfs/go-ipfs-chunker"
ipld "github.com/ipfs/go-ipld-format"
importer "github.com/ipfs/go-unixfs/importer"
"github.com/ipfs/go-unixfs/importer/balanced"
helper "github.com/ipfs/go-unixfs/importer/helpers"
mh "github.com/multiformats/go-multihash"
ds "github.com/ipfs/go-datastore"
ds_sync "github.com/ipfs/go-datastore/sync"
bs "github.com/ipfs/go-ipfs-blockstore"
)
const DEFAULT_CHUNK_SIZE = 1024 * 1024
func rootCid0(reader io.Reader) (ipld.Node, error) {
bs := bs.NewBlockstore(ds_sync.MutexWrap(ds.NewMapDatastore()))
bserv := blockservice.New(bs, nil)
dserv := merkledag.NewDAGService(bserv)
return importer.BuildDagFromReader(dserv, chunker.DefaultSplitter(reader))
}
func rootCid1(contentReader io.Reader) (ipld.Node, error) {
bs := bs.NewBlockstore(ds_sync.MutexWrap(ds.NewMapDatastore()))
bserv := blockservice.New(bs, nil)
dserv := merkledag.NewDAGService(bserv)
prefix, err := merkledag.PrefixForCidVersion(1)
if err != nil {
return nil, err
}
prefix.MhType = uint64(mh.SHA2_256)
spl := chunker.NewSizeSplitter(contentReader, DEFAULT_CHUNK_SIZE)
dbp := helper.DagBuilderParams{
Maxlinks: 1024,
RawLeaves: true,
CidBuilder: cidutil.InlineBuilder{
Builder: prefix,
Limit: 32,
},
Dagserv: dserv,
}
db, err := dbp.New(spl)
if err != nil {
return nil, err
}
return balanced.Layout(db)
}
func SumCid(contents []byte) (cid.Cid, error) {
nd, err := rootCid1(bytes.NewReader(contents))
if err != nil {
return cid.Undef, err
}
return nd.Cid(), nil
}
func Sum(contents []byte) ([]byte, error) {
c, err := SumCid(contents)
if err != nil {
return nil, err
}
return c.Bytes(), nil
}
func EncodeToString(contents []byte) string {
_, c, err := cid.CidFromBytes(contents)
if err != nil {
panic(err)
}
return c.String()
}
func main() {
if len(os.Args) == 1 {
panic("usage: estuary-cid /path/to/anyfile.png")
}
b, err := os.ReadFile(os.Args[1])
if err != nil {
fmt.Print(err)
}
cid, err := Sum(b)
if err != nil {
fmt.Print(err)
}
fmt.Println(EncodeToString(cid))
}