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diff.go
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diff.go
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package init
import (
"bytes"
typegen "github.com/whyrusleeping/cbor-gen"
"github.com/filecoin-project/go-address"
"github.com/filecoin-project/go-state-types/abi"
"github.com/filecoin-project/lotus/chain/actors/adt"
)
func DiffAddressMap(pre, cur State) (*AddressMapChanges, error) {
prem, err := pre.AddressMap()
if err != nil {
return nil, err
}
curm, err := cur.AddressMap()
if err != nil {
return nil, err
}
preRoot, err := prem.Root()
if err != nil {
return nil, err
}
curRoot, err := curm.Root()
if err != nil {
return nil, err
}
results := new(AddressMapChanges)
// no change.
if curRoot.Equals(preRoot) {
return results, nil
}
err = adt.DiffAdtMap(prem, curm, &addressMapDiffer{results, pre, cur})
if err != nil {
return nil, err
}
return results, nil
}
type addressMapDiffer struct {
Results *AddressMapChanges
pre, adter State
}
type AddressMapChanges struct {
Added []AddressPair
Modified []AddressChange
Removed []AddressPair
}
func (i *addressMapDiffer) AsKey(key string) (abi.Keyer, error) {
addr, err := address.NewFromBytes([]byte(key))
if err != nil {
return nil, err
}
return abi.AddrKey(addr), nil
}
func (i *addressMapDiffer) Add(key string, val *typegen.Deferred) error {
pkAddr, err := address.NewFromBytes([]byte(key))
if err != nil {
return err
}
id := new(typegen.CborInt)
if err := id.UnmarshalCBOR(bytes.NewReader(val.Raw)); err != nil {
return err
}
idAddr, err := address.NewIDAddress(uint64(*id))
if err != nil {
return err
}
i.Results.Added = append(i.Results.Added, AddressPair{
ID: idAddr,
PK: pkAddr,
})
return nil
}
func (i *addressMapDiffer) Modify(key string, from, to *typegen.Deferred) error {
pkAddr, err := address.NewFromBytes([]byte(key))
if err != nil {
return err
}
fromID := new(typegen.CborInt)
if err := fromID.UnmarshalCBOR(bytes.NewReader(from.Raw)); err != nil {
return err
}
fromIDAddr, err := address.NewIDAddress(uint64(*fromID))
if err != nil {
return err
}
toID := new(typegen.CborInt)
if err := toID.UnmarshalCBOR(bytes.NewReader(to.Raw)); err != nil {
return err
}
toIDAddr, err := address.NewIDAddress(uint64(*toID))
if err != nil {
return err
}
i.Results.Modified = append(i.Results.Modified, AddressChange{
From: AddressPair{
ID: fromIDAddr,
PK: pkAddr,
},
To: AddressPair{
ID: toIDAddr,
PK: pkAddr,
},
})
return nil
}
func (i *addressMapDiffer) Remove(key string, val *typegen.Deferred) error {
pkAddr, err := address.NewFromBytes([]byte(key))
if err != nil {
return err
}
id := new(typegen.CborInt)
if err := id.UnmarshalCBOR(bytes.NewReader(val.Raw)); err != nil {
return err
}
idAddr, err := address.NewIDAddress(uint64(*id))
if err != nil {
return err
}
i.Results.Removed = append(i.Results.Removed, AddressPair{
ID: idAddr,
PK: pkAddr,
})
return nil
}
type AddressChange struct {
From AddressPair
To AddressPair
}
type AddressPair struct {
ID address.Address
PK address.Address
}