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Merge pull request #11185 from filecoin-project/feat/snpc2
feat: worker: Support delegating precommit2 to external binary
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| package commitment | ||
|
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| import ( | ||
| "io" | ||
| "os" | ||
| "path/filepath" | ||
| ) | ||
|
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| const treeDFile = "sc-02-data-tree-d.dat" | ||
|
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| // TreeDCommD reads CommD from tree-d | ||
| func TreeDCommD(cache string) ([32]byte, error) { | ||
| // Open the tree-d file for reading | ||
| file, err := os.Open(filepath.Join(cache, treeDFile)) | ||
| if err != nil { | ||
| return [32]byte{}, err | ||
| } | ||
| defer file.Close() // nolint:errcheck | ||
|
|
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| // Seek to 32 bytes from the end of the file | ||
| _, err = file.Seek(-32, io.SeekEnd) | ||
| if err != nil { | ||
| return [32]byte{}, err | ||
| } | ||
|
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| // Read the last 32 bytes | ||
| var commD [32]byte | ||
| _, err = file.Read(commD[:]) | ||
| if err != nil { | ||
| return [32]byte{}, err | ||
| } | ||
|
|
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| return commD, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| package commitment | ||
|
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| import ( | ||
| "math/big" | ||
| "os" | ||
| "path/filepath" | ||
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| "github.com/triplewz/poseidon" | ||
| ff "github.com/triplewz/poseidon/bls12_381" | ||
| "golang.org/x/xerrors" | ||
| ) | ||
|
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| const pauxFile = "p_aux" | ||
|
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| func CommR(commC, commRLast [32]byte) ([32]byte, error) { | ||
| // reverse commC and commRLast so that endianness is correct | ||
| for i, j := 0, len(commC)-1; i < j; i, j = i+1, j-1 { | ||
| commC[i], commC[j] = commC[j], commC[i] | ||
| commRLast[i], commRLast[j] = commRLast[j], commRLast[i] | ||
| } | ||
|
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| input_a := new(big.Int) | ||
| input_a.SetBytes(commC[:]) | ||
| input_b := new(big.Int) | ||
| input_b.SetBytes(commRLast[:]) | ||
| input := []*big.Int{input_a, input_b} | ||
|
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| cons, err := poseidon.GenPoseidonConstants(3) | ||
| if err != nil { | ||
| return [32]byte{}, err | ||
| } | ||
|
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| h1, err := poseidon.Hash(input, cons, poseidon.OptimizedStatic) | ||
| if err != nil { | ||
| return [32]byte{}, err | ||
| } | ||
|
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| h1element := new(ff.Element).SetBigInt(h1).Bytes() | ||
|
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| // reverse the bytes so that endianness is correct | ||
| for i, j := 0, len(h1element)-1; i < j; i, j = i+1, j-1 { | ||
| h1element[i], h1element[j] = h1element[j], h1element[i] | ||
| } | ||
|
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| return h1element, nil | ||
| } | ||
|
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| // PAuxCommR reads p_aux and computes CommR | ||
| func PAuxCommR(cache string) ([32]byte, error) { | ||
| commCcommRLast, err := os.ReadFile(filepath.Join(cache, pauxFile)) | ||
| if err != nil { | ||
| return [32]byte{}, err | ||
| } | ||
|
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| if len(commCcommRLast) != 64 { | ||
| return [32]byte{}, xerrors.Errorf("invalid commCcommRLast length %d", len(commCcommRLast)) | ||
| } | ||
|
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| var commC, commRLast [32]byte | ||
| copy(commC[:], commCcommRLast[:32]) | ||
| copy(commRLast[:], commCcommRLast[32:]) | ||
|
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| return CommR(commC, commRLast) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| package commitment | ||
|
|
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| import ( | ||
| "testing" | ||
|
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| "github.com/stretchr/testify/require" | ||
| ) | ||
|
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| func TestCommR(t *testing.T) { | ||
| var commC = [32]byte{ | ||
| 0x09, 0x1e, 0x07, 0x3b, 0x98, 0x2f, 0x66, 0xf0, | ||
| 0x13, 0xc0, 0x26, 0xda, 0x6e, 0x54, 0xd8, 0x7d, | ||
| 0xbf, 0x8b, 0xba, 0x84, 0x8e, 0xf5, 0x7a, 0x55, | ||
| 0x29, 0xc7, 0xe7, 0xf7, 0x2c, 0x82, 0x88, 0x43, | ||
| } | ||
|
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| var commRLast = [32]byte{ | ||
| 0xf0, 0xc5, 0x78, 0x5c, 0x6c, 0x8c, 0xf6, 0x2d, | ||
| 0x96, 0x8b, 0x1e, 0xcd, 0x68, 0xed, 0xb9, 0xd9, | ||
| 0x1e, 0xb9, 0x44, 0x5c, 0x78, 0x58, 0xa6, 0x00, | ||
| 0x26, 0xf8, 0x82, 0x68, 0x60, 0xf7, 0xe7, 0x68, | ||
| } | ||
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| res, err := CommR(commC, commRLast) | ||
| require.NoError(t, err) | ||
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| var expected = [32]byte{ | ||
| 0xe6, 0x74, 0xd1, 0x9e, 0x6c, 0xe7, 0xfc, 0xf3, | ||
| 0x3b, 0xbf, 0xd9, 0xb3, 0x43, 0xa0, 0xce, 0xb1, | ||
| 0x2d, 0x28, 0x31, 0xd1, 0xda, 0x54, 0x31, 0x61, | ||
| 0x89, 0x1e, 0xbc, 0xca, 0xd2, 0xc6, 0xdb, 0x01, | ||
| } | ||
|
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| require.Equal(t, res, expected) | ||
| } |
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