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diff.go
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diff.go
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package multisig
import (
"github.com/filecoin-project/go-address"
"github.com/filecoin-project/go-state-types/abi"
cbg "github.com/whyrusleeping/cbor-gen"
"github.com/filecoin-project/lotus/chain/actors/adt"
)
type PendingTransactionChanges struct {
Added []TransactionChange
Modified []TransactionModification
Removed []TransactionChange
}
type TransactionChange struct {
TxID int64
Tx Transaction
}
type TransactionModification struct {
TxID int64
From Transaction
To Transaction
}
func DiffPendingTransactions(pre, cur State) (*PendingTransactionChanges, error) {
results := new(PendingTransactionChanges)
if changed, err := pre.PendingTxnChanged(cur); err != nil {
return nil, err
} else if !changed { // if nothing has changed then return an empty result and bail.
return results, nil
}
pret, err := pre.transactions()
if err != nil {
return nil, err
}
curt, err := cur.transactions()
if err != nil {
return nil, err
}
if err := adt.DiffAdtMap(pret, curt, &transactionDiffer{results, pre, cur}); err != nil {
return nil, err
}
return results, nil
}
type transactionDiffer struct {
Results *PendingTransactionChanges
pre, after State
}
func (t *transactionDiffer) AsKey(key string) (abi.Keyer, error) {
txID, err := abi.ParseIntKey(key)
if err != nil {
return nil, err
}
return abi.IntKey(txID), nil
}
func (t *transactionDiffer) Add(key string, val *cbg.Deferred) error {
txID, err := abi.ParseIntKey(key)
if err != nil {
return err
}
tx, err := t.after.decodeTransaction(val)
if err != nil {
return err
}
t.Results.Added = append(t.Results.Added, TransactionChange{
TxID: txID,
Tx: tx,
})
return nil
}
func (t *transactionDiffer) Modify(key string, from, to *cbg.Deferred) error {
txID, err := abi.ParseIntKey(key)
if err != nil {
return err
}
txFrom, err := t.pre.decodeTransaction(from)
if err != nil {
return err
}
txTo, err := t.after.decodeTransaction(to)
if err != nil {
return err
}
if approvalsChanged(txFrom.Approved, txTo.Approved) {
t.Results.Modified = append(t.Results.Modified, TransactionModification{
TxID: txID,
From: txFrom,
To: txTo,
})
}
return nil
}
func approvalsChanged(from, to []address.Address) bool {
if len(from) != len(to) {
return true
}
for idx := range from {
if from[idx] != to[idx] {
return true
}
}
return false
}
func (t *transactionDiffer) Remove(key string, val *cbg.Deferred) error {
txID, err := abi.ParseIntKey(key)
if err != nil {
return err
}
tx, err := t.pre.decodeTransaction(val)
if err != nil {
return err
}
t.Results.Removed = append(t.Results.Removed, TransactionChange{
TxID: txID,
Tx: tx,
})
return nil
}