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libs: Use zerocomm from sectorbuilder

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This commit is contained in:
Łukasz Magiera 2020-03-06 19:50:41 +01:00
parent 61802b9d42
commit e51fa5c9ac
5 changed files with 4 additions and 189 deletions
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24
chain/vm/syscalls.go
View File

@ -3,11 +3,9 @@ package vm
import ( import (
"context" "context"
"fmt" "fmt"
"math/bits"
"github.com/filecoin-project/go-address" "github.com/filecoin-project/go-address"
"github.com/filecoin-project/go-sectorbuilder" "github.com/filecoin-project/go-sectorbuilder"
"github.com/filecoin-project/lotus/lib/zerocomm"
"github.com/filecoin-project/specs-actors/actors/abi" "github.com/filecoin-project/specs-actors/actors/abi"
"github.com/filecoin-project/specs-actors/actors/crypto" "github.com/filecoin-project/specs-actors/actors/crypto"
"github.com/filecoin-project/specs-actors/actors/runtime" "github.com/filecoin-project/specs-actors/actors/runtime"
@ -36,28 +34,6 @@ func (ss *syscallShim) ComputeUnsealedSectorCID(st abi.RegisteredProof, pieces [
sum += p.Size sum += p.Size
} }
ssize, err := st.SectorSize()
if err != nil {
return cid.Undef, err
}
{
// pad remaining space with 0 CommPs
toFill := uint64(abi.PaddedPieceSize(ssize) - sum)
n := bits.OnesCount64(toFill)
for i := 0; i < n; i++ {
next := bits.TrailingZeros64(toFill)
psize := uint64(1) << next
toFill ^= psize
unpadded := abi.PaddedPieceSize(psize).Unpadded()
pieces = append(pieces, abi.PieceInfo{
Size: unpadded.Padded(),
PieceCID: zerocomm.ForSize(unpadded),
})
}
}
commd, err := sectorbuilder.GenerateUnsealedCID(st, pieces) commd, err := sectorbuilder.GenerateUnsealedCID(st, pieces)
if err != nil { if err != nil {
log.Errorf("generate data commitment failed: %s", err) log.Errorf("generate data commitment failed: %s", err)

55
lib/zerocomm/zerocomm.go
View File

@ -1,55 +0,0 @@
package zerocomm
import (
"math/bits"
commcid "github.com/filecoin-project/go-fil-commcid"
"github.com/filecoin-project/specs-actors/actors/abi"
"github.com/ipfs/go-cid"
)
const levels = 37
const skip = 2 // can't generate for 32, 64b
var pieceComms = [levels - skip][32]byte{
{0x37, 0x31, 0xbb, 0x99, 0xac, 0x68, 0x9f, 0x66, 0xee, 0xf5, 0x97, 0x3e, 0x4a, 0x94, 0xda, 0x18, 0x8f, 0x4d, 0xdc, 0xae, 0x58, 0x7, 0x24, 0xfc, 0x6f, 0x3f, 0xd6, 0xd, 0xfd, 0x48, 0x83, 0x33},
{0x64, 0x2a, 0x60, 0x7e, 0xf8, 0x86, 0xb0, 0x4, 0xbf, 0x2c, 0x19, 0x78, 0x46, 0x3a, 0xe1, 0xd4, 0x69, 0x3a, 0xc0, 0xf4, 0x10, 0xeb, 0x2d, 0x1b, 0x7a, 0x47, 0xfe, 0x20, 0x5e, 0x5e, 0x75, 0xf},
{0x57, 0xa2, 0x38, 0x1a, 0x28, 0x65, 0x2b, 0xf4, 0x7f, 0x6b, 0xef, 0x7a, 0xca, 0x67, 0x9b, 0xe4, 0xae, 0xde, 0x58, 0x71, 0xab, 0x5c, 0xf3, 0xeb, 0x2c, 0x8, 0x11, 0x44, 0x88, 0xcb, 0x85, 0x26},
{0x1f, 0x7a, 0xc9, 0x59, 0x55, 0x10, 0xe0, 0x9e, 0xa4, 0x1c, 0x46, 0xb, 0x17, 0x64, 0x30, 0xbb, 0x32, 0x2c, 0xd6, 0xfb, 0x41, 0x2e, 0xc5, 0x7c, 0xb1, 0x7d, 0x98, 0x9a, 0x43, 0x10, 0x37, 0x2f},
{0xfc, 0x7e, 0x92, 0x82, 0x96, 0xe5, 0x16, 0xfa, 0xad, 0xe9, 0x86, 0xb2, 0x8f, 0x92, 0xd4, 0x4a, 0x4f, 0x24, 0xb9, 0x35, 0x48, 0x52, 0x23, 0x37, 0x6a, 0x79, 0x90, 0x27, 0xbc, 0x18, 0xf8, 0x33},
{0x8, 0xc4, 0x7b, 0x38, 0xee, 0x13, 0xbc, 0x43, 0xf4, 0x1b, 0x91, 0x5c, 0xe, 0xed, 0x99, 0x11, 0xa2, 0x60, 0x86, 0xb3, 0xed, 0x62, 0x40, 0x1b, 0xf9, 0xd5, 0x8b, 0x8d, 0x19, 0xdf, 0xf6, 0x24},
{0xb2, 0xe4, 0x7b, 0xfb, 0x11, 0xfa, 0xcd, 0x94, 0x1f, 0x62, 0xaf, 0x5c, 0x75, 0xf, 0x3e, 0xa5, 0xcc, 0x4d, 0xf5, 0x17, 0xd5, 0xc4, 0xf1, 0x6d, 0xb2, 0xb4, 0xd7, 0x7b, 0xae, 0xc1, 0xa3, 0x2f},
{0xf9, 0x22, 0x61, 0x60, 0xc8, 0xf9, 0x27, 0xbf, 0xdc, 0xc4, 0x18, 0xcd, 0xf2, 0x3, 0x49, 0x31, 0x46, 0x0, 0x8e, 0xae, 0xfb, 0x7d, 0x2, 0x19, 0x4d, 0x5e, 0x54, 0x81, 0x89, 0x0, 0x51, 0x8},
{0x2c, 0x1a, 0x96, 0x4b, 0xb9, 0xb, 0x59, 0xeb, 0xfe, 0xf, 0x6d, 0xa2, 0x9a, 0xd6, 0x5a, 0xe3, 0xe4, 0x17, 0x72, 0x4a, 0x8f, 0x7c, 0x11, 0x74, 0x5a, 0x40, 0xca, 0xc1, 0xe5, 0xe7, 0x40, 0x11},
{0xfe, 0xe3, 0x78, 0xce, 0xf1, 0x64, 0x4, 0xb1, 0x99, 0xed, 0xe0, 0xb1, 0x3e, 0x11, 0xb6, 0x24, 0xff, 0x9d, 0x78, 0x4f, 0xbb, 0xed, 0x87, 0x8d, 0x83, 0x29, 0x7e, 0x79, 0x5e, 0x2, 0x4f, 0x2},
{0x8e, 0x9e, 0x24, 0x3, 0xfa, 0x88, 0x4c, 0xf6, 0x23, 0x7f, 0x60, 0xdf, 0x25, 0xf8, 0x3e, 0xe4, 0xd, 0xca, 0x9e, 0xd8, 0x79, 0xeb, 0x6f, 0x63, 0x52, 0xd1, 0x50, 0x84, 0xf5, 0xad, 0xd, 0x3f},
{0x75, 0x2d, 0x96, 0x93, 0xfa, 0x16, 0x75, 0x24, 0x39, 0x54, 0x76, 0xe3, 0x17, 0xa9, 0x85, 0x80, 0xf0, 0x9, 0x47, 0xaf, 0xb7, 0xa3, 0x5, 0x40, 0xd6, 0x25, 0xa9, 0x29, 0x1c, 0xc1, 0x2a, 0x7},
{0x70, 0x22, 0xf6, 0xf, 0x7e, 0xf6, 0xad, 0xfa, 0x17, 0x11, 0x7a, 0x52, 0x61, 0x9e, 0x30, 0xce, 0xa8, 0x2c, 0x68, 0x7, 0x5a, 0xdf, 0x1c, 0x66, 0x77, 0x86, 0xec, 0x50, 0x6e, 0xef, 0x2d, 0x19},
{0xd9, 0x98, 0x87, 0xb9, 0x73, 0x57, 0x3a, 0x96, 0xe1, 0x13, 0x93, 0x64, 0x52, 0x36, 0xc1, 0x7b, 0x1f, 0x4c, 0x70, 0x34, 0xd7, 0x23, 0xc7, 0xa9, 0x9f, 0x70, 0x9b, 0xb4, 0xda, 0x61, 0x16, 0x2b},
{0xd0, 0xb5, 0x30, 0xdb, 0xb0, 0xb4, 0xf2, 0x5c, 0x5d, 0x2f, 0x2a, 0x28, 0xdf, 0xee, 0x80, 0x8b, 0x53, 0x41, 0x2a, 0x2, 0x93, 0x1f, 0x18, 0xc4, 0x99, 0xf5, 0xa2, 0x54, 0x8, 0x6b, 0x13, 0x26},
{0x84, 0xc0, 0x42, 0x1b, 0xa0, 0x68, 0x5a, 0x1, 0xbf, 0x79, 0x5a, 0x23, 0x44, 0x6, 0x4f, 0xe4, 0x24, 0xbd, 0x52, 0xa9, 0xd2, 0x43, 0x77, 0xb3, 0x94, 0xff, 0x4c, 0x4b, 0x45, 0x68, 0xe8, 0x11},
{0x65, 0xf2, 0x9e, 0x5d, 0x98, 0xd2, 0x46, 0xc3, 0x8b, 0x38, 0x8c, 0xfc, 0x6, 0xdb, 0x1f, 0x6b, 0x2, 0x13, 0x3, 0xc5, 0xa2, 0x89, 0x0, 0xb, 0xdc, 0xe8, 0x32, 0xa9, 0xc3, 0xec, 0x42, 0x1c},
{0xa2, 0x24, 0x75, 0x8, 0x28, 0x58, 0x50, 0x96, 0x5b, 0x7e, 0x33, 0x4b, 0x31, 0x27, 0xb0, 0xc0, 0x42, 0xb1, 0xd0, 0x46, 0xdc, 0x54, 0x40, 0x21, 0x37, 0x62, 0x7c, 0xd8, 0x79, 0x9c, 0xe1, 0x3a},
{0xda, 0xfd, 0xab, 0x6d, 0xa9, 0x36, 0x44, 0x53, 0xc2, 0x6d, 0x33, 0x72, 0x6b, 0x9f, 0xef, 0xe3, 0x43, 0xbe, 0x8f, 0x81, 0x64, 0x9e, 0xc0, 0x9, 0xaa, 0xd3, 0xfa, 0xff, 0x50, 0x61, 0x75, 0x8},
{0xd9, 0x41, 0xd5, 0xe0, 0xd6, 0x31, 0x4a, 0x99, 0x5c, 0x33, 0xff, 0xbd, 0x4f, 0xbe, 0x69, 0x11, 0x8d, 0x73, 0xd4, 0xe5, 0xfd, 0x2c, 0xd3, 0x1f, 0xf, 0x7c, 0x86, 0xeb, 0xdd, 0x14, 0xe7, 0x6},
{0x51, 0x4c, 0x43, 0x5c, 0x3d, 0x4, 0xd3, 0x49, 0xa5, 0x36, 0x5f, 0xbd, 0x59, 0xff, 0xc7, 0x13, 0x62, 0x91, 0x11, 0x78, 0x59, 0x91, 0xc1, 0xa3, 0xc5, 0x3a, 0xf2, 0x20, 0x79, 0x74, 0x1a, 0x2f},
{0xad, 0x6, 0x85, 0x39, 0x69, 0xd3, 0x7d, 0x34, 0xff, 0x8, 0xe0, 0x9f, 0x56, 0x93, 0xa, 0x4a, 0xd1, 0x9a, 0x89, 0xde, 0xf6, 0xc, 0xbf, 0xee, 0x7e, 0x1d, 0x33, 0x81, 0xc1, 0xe7, 0x1c, 0x37},
{0x39, 0x56, 0xe, 0x7b, 0x13, 0xa9, 0x3b, 0x7, 0xa2, 0x43, 0xfd, 0x27, 0x20, 0xff, 0xa7, 0xcb, 0x3e, 0x1d, 0x2e, 0x50, 0x5a, 0xb3, 0x62, 0x9e, 0x79, 0xf4, 0x63, 0x13, 0x51, 0x2c, 0xda, 0x6},
{0xcc, 0xc3, 0xc0, 0x12, 0xf5, 0xb0, 0x5e, 0x81, 0x1a, 0x2b, 0xbf, 0xdd, 0xf, 0x68, 0x33, 0xb8, 0x42, 0x75, 0xb4, 0x7b, 0xf2, 0x29, 0xc0, 0x5, 0x2a, 0x82, 0x48, 0x4f, 0x3c, 0x1a, 0x5b, 0x3d},
{0x7d, 0xf2, 0x9b, 0x69, 0x77, 0x31, 0x99, 0xe8, 0xf2, 0xb4, 0xb, 0x77, 0x91, 0x9d, 0x4, 0x85, 0x9, 0xee, 0xd7, 0x68, 0xe2, 0xc7, 0x29, 0x7b, 0x1f, 0x14, 0x37, 0x3, 0x4f, 0xc3, 0xc6, 0x2c},
{0x66, 0xce, 0x5, 0xa3, 0x66, 0x75, 0x52, 0xcf, 0x45, 0xc0, 0x2b, 0xcc, 0x4e, 0x83, 0x92, 0x91, 0x9b, 0xde, 0xac, 0x35, 0xde, 0x2f, 0xf5, 0x62, 0x71, 0x84, 0x8e, 0x9f, 0x7b, 0x67, 0x51, 0x7},
{0xd8, 0x61, 0x2, 0x18, 0x42, 0x5a, 0xb5, 0xe9, 0x5b, 0x1c, 0xa6, 0x23, 0x9d, 0x29, 0xa2, 0xe4, 0x20, 0xd7, 0x6, 0xa9, 0x6f, 0x37, 0x3e, 0x2f, 0x9c, 0x9a, 0x91, 0xd7, 0x59, 0xd1, 0x9b, 0x1},
{0x6d, 0x36, 0x4b, 0x1e, 0xf8, 0x46, 0x44, 0x1a, 0x5a, 0x4a, 0x68, 0x86, 0x23, 0x14, 0xac, 0xc0, 0xa4, 0x6f, 0x1, 0x67, 0x17, 0xe5, 0x34, 0x43, 0xe8, 0x39, 0xee, 0xdf, 0x83, 0xc2, 0x85, 0x3c},
{0x7, 0x7e, 0x5f, 0xde, 0x35, 0xc5, 0xa, 0x93, 0x3, 0xa5, 0x50, 0x9, 0xe3, 0x49, 0x8a, 0x4e, 0xbe, 0xdf, 0xf3, 0x9c, 0x42, 0xb7, 0x10, 0xb7, 0x30, 0xd8, 0xec, 0x7a, 0xc7, 0xaf, 0xa6, 0x3e},
{0xe6, 0x40, 0x5, 0xa6, 0xbf, 0xe3, 0x77, 0x79, 0x53, 0xb8, 0xad, 0x6e, 0xf9, 0x3f, 0xf, 0xca, 0x10, 0x49, 0xb2, 0x4, 0x16, 0x54, 0xf2, 0xa4, 0x11, 0xf7, 0x70, 0x27, 0x99, 0xce, 0xce, 0x2},
{0x25, 0x9d, 0x3d, 0x6b, 0x1f, 0x4d, 0x87, 0x6d, 0x11, 0x85, 0xe1, 0x12, 0x3a, 0xf6, 0xf5, 0x50, 0x1a, 0xf0, 0xf6, 0x7c, 0xf1, 0x5b, 0x52, 0x16, 0x25, 0x5b, 0x7b, 0x17, 0x8d, 0x12, 0x5, 0x1d},
{0x3f, 0x9a, 0x4d, 0x41, 0x1d, 0xa4, 0xef, 0x1b, 0x36, 0xf3, 0x5f, 0xf0, 0xa1, 0x95, 0xae, 0x39, 0x2a, 0xb2, 0x3f, 0xee, 0x79, 0x67, 0xb7, 0xc4, 0x1b, 0x3, 0xd1, 0x61, 0x3f, 0xc2, 0x92, 0x39},
{0xfe, 0x4e, 0xf3, 0x28, 0xc6, 0x1a, 0xa3, 0x9c, 0xfd, 0xb2, 0x48, 0x4e, 0xaa, 0x32, 0xa1, 0x51, 0xb1, 0xfe, 0x3d, 0xfd, 0x1f, 0x96, 0xdd, 0x8c, 0x97, 0x11, 0xfd, 0x86, 0xd6, 0xc5, 0x81, 0x13},
{0xf5, 0x5d, 0x68, 0x90, 0xe, 0x2d, 0x83, 0x81, 0xec, 0xcb, 0x81, 0x64, 0xcb, 0x99, 0x76, 0xf2, 0x4b, 0x2d, 0xe0, 0xdd, 0x61, 0xa3, 0x1b, 0x97, 0xce, 0x6e, 0xb2, 0x38, 0x50, 0xd5, 0xe8, 0x19},
{0xaa, 0xaa, 0x8c, 0x4c, 0xb4, 0xa, 0xac, 0xee, 0x1e, 0x2, 0xdc, 0x65, 0x42, 0x4b, 0x2a, 0x6c, 0x8e, 0x99, 0xf8, 0x3, 0xb7, 0x2f, 0x79, 0x29, 0xc4, 0x10, 0x1d, 0x7f, 0xae, 0x6b, 0xff, 0x32},
}
func ForSize(sz abi.UnpaddedPieceSize) cid.Cid {
level := bits.TrailingZeros64(uint64(sz.Padded())) - skip - 5 // 2^5 = 32
return commcid.DataCommitmentV1ToCID(pieceComms[level][:])
}

106
lib/zerocomm/zerocomm_test.go
View File

@ -1,106 +0,0 @@
package zerocomm
import (
"bytes"
"fmt"
"io"
"testing"
commcid "github.com/filecoin-project/go-fil-commcid"
"github.com/filecoin-project/go-sectorbuilder"
abi "github.com/filecoin-project/specs-actors/actors/abi"
"github.com/ipfs/go-cid"
"github.com/filecoin-project/lotus/lib/nullreader"
)
func TestComms(t *testing.T) {
t.Skip("don't have enough ram") // no, but seriously, currently this needs like 3tb of /tmp
var expPieceComms [levels - skip]cid.Cid
{
l2, err := sectorbuilder.GeneratePieceCIDFromFile(abi.RegisteredProof_StackedDRG2KiBPoSt, bytes.NewReader(make([]byte, 127)), 127)
if err != nil {
t.Fatal(err)
}
expPieceComms[0] = l2
}
for i := 1; i < levels-2; i++ {
var err error
sz := abi.UnpaddedPieceSize(127 << i)
fmt.Println(i, sz)
r := io.LimitReader(&nullreader.Reader{}, int64(sz))
expPieceComms[i], err = sectorbuilder.GeneratePieceCIDFromFile(abi.RegisteredProof_StackedDRG2KiBPoSt, r, sz)
if err != nil {
t.Fatal(err)
}
}
for i, comm := range expPieceComms {
c, err := commcid.CIDToPieceCommitmentV1(comm)
if err != nil {
t.Fatal(err)
}
if string(c) != string(pieceComms[i][:]) {
t.Errorf("zero commitment %d didn't match", i)
}
}
for _, comm := range expPieceComms { // Could do codegen, but this is good enough
fmt.Printf("%#v,\n", comm)
}
}
func TestCommsSmall(t *testing.T) {
var expPieceComms [8]cid.Cid
lvls := len(expPieceComms) + skip
{
l2, err := sectorbuilder.GeneratePieceCIDFromFile(abi.RegisteredProof_StackedDRG2KiBPoSt, bytes.NewReader(make([]byte, 127)), 127)
if err != nil {
t.Fatal(err)
}
expPieceComms[0] = l2
}
for i := 1; i < lvls-2; i++ {
var err error
sz := abi.UnpaddedPieceSize(127 << i)
fmt.Println(i, sz)
r := io.LimitReader(&nullreader.Reader{}, int64(sz))
expPieceComms[i], err = sectorbuilder.GeneratePieceCIDFromFile(abi.RegisteredProof_StackedDRG2KiBPoSt, r, sz)
if err != nil {
t.Fatal(err)
}
}
for i, comm := range expPieceComms {
c, err := commcid.CIDToPieceCommitmentV1(comm)
if err != nil {
t.Fatal(err)
}
if string(c) != string(pieceComms[i][:]) {
t.Errorf("zero commitment %d didn't match", i)
}
}
for _, comm := range expPieceComms { // Could do codegen, but this is good enough
fmt.Printf("%#v,\n", comm)
}
}
func TestForSise(t *testing.T) {
exp, err := sectorbuilder.GeneratePieceCIDFromFile(abi.RegisteredProof_StackedDRG2KiBPoSt, bytes.NewReader(make([]byte, 1016)), 1016)
if err != nil {
return
}
actual := ForSize(1016)
if !exp.Equals(actual) {
t.Errorf("zero commitment didn't match")
}
}

4
storage/sbmock/preseal.go
View File

@ -3,6 +3,7 @@ package sbmock
import ( import (
"github.com/filecoin-project/go-address" "github.com/filecoin-project/go-address"
commcid "github.com/filecoin-project/go-fil-commcid" commcid "github.com/filecoin-project/go-fil-commcid"
"github.com/filecoin-project/go-sectorbuilder"
"github.com/filecoin-project/specs-actors/actors/abi" "github.com/filecoin-project/specs-actors/actors/abi"
"github.com/filecoin-project/specs-actors/actors/abi/big" "github.com/filecoin-project/specs-actors/actors/abi/big"
"github.com/filecoin-project/specs-actors/actors/builtin/market" "github.com/filecoin-project/specs-actors/actors/builtin/market"
@ -12,7 +13,6 @@ import (
"github.com/filecoin-project/lotus/chain/types" "github.com/filecoin-project/lotus/chain/types"
"github.com/filecoin-project/lotus/chain/wallet" "github.com/filecoin-project/lotus/chain/wallet"
"github.com/filecoin-project/lotus/genesis" "github.com/filecoin-project/lotus/genesis"
"github.com/filecoin-project/lotus/lib/zerocomm"
) )
func PreSeal(ssize abi.SectorSize, maddr address.Address, sectors int) (*genesis.Miner, *types.KeyInfo, error) { func PreSeal(ssize abi.SectorSize, maddr address.Address, sectors int) (*genesis.Miner, *types.KeyInfo, error) {
@ -39,7 +39,7 @@ func PreSeal(ssize abi.SectorSize, maddr address.Address, sectors int) (*genesis
preseal := &genesis.PreSeal{} preseal := &genesis.PreSeal{}
preseal.ProofType = st preseal.ProofType = st
preseal.CommD = zerocomm.ForSize(abi.PaddedPieceSize(ssize).Unpadded()) preseal.CommD = sectorbuilder.ZeroPieceCommitment(abi.PaddedPieceSize(ssize).Unpadded())
d, _ := commcid.CIDToPieceCommitmentV1(preseal.CommD) d, _ := commcid.CIDToPieceCommitmentV1(preseal.CommD)
r := commDR(d) r := commDR(d)
preseal.CommR = commcid.ReplicaCommitmentV1ToCID(r[:]) preseal.CommR = commcid.ReplicaCommitmentV1ToCID(r[:])

4
storage/sealing/checks.go
View File

@ -4,6 +4,7 @@ import (
"bytes" "bytes"
"context" "context"
"github.com/filecoin-project/go-sectorbuilder"
"github.com/ipfs/go-cid" "github.com/ipfs/go-cid"
cbg "github.com/whyrusleeping/cbor-gen" cbg "github.com/whyrusleeping/cbor-gen"
"golang.org/x/xerrors" "golang.org/x/xerrors"
@ -15,7 +16,6 @@ import (
"github.com/filecoin-project/lotus/build" "github.com/filecoin-project/lotus/build"
"github.com/filecoin-project/lotus/chain/actors" "github.com/filecoin-project/lotus/chain/actors"
"github.com/filecoin-project/lotus/chain/types" "github.com/filecoin-project/lotus/chain/types"
"github.com/filecoin-project/lotus/lib/zerocomm"
) )
// TODO: For now we handle this by halting state execution, when we get jsonrpc reconnecting // TODO: For now we handle this by halting state execution, when we get jsonrpc reconnecting
@ -42,7 +42,7 @@ func checkPieces(ctx context.Context, si SectorInfo, api sealingApi) error {
for i, piece := range si.Pieces { for i, piece := range si.Pieces {
if piece.DealID == nil { if piece.DealID == nil {
exp := zerocomm.ForSize(piece.Size) exp := sectorbuilder.ZeroPieceCommitment(piece.Size)
if piece.CommP != exp { if piece.CommP != exp {
return &ErrInvalidPiece{xerrors.Errorf("deal %d piece %d had non-zero CommP %+v", piece.DealID, i, piece.CommP)} return &ErrInvalidPiece{xerrors.Errorf("deal %d piece %d had non-zero CommP %+v", piece.DealID, i, piece.CommP)}
} }