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accounts.go
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accounts.go
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package account
import (
"io"
"sync/atomic"
"github.com/iotaledger/hive.go/core/safemath"
"github.com/iotaledger/hive.go/ds/shrinkingmap"
"github.com/iotaledger/hive.go/ierrors"
"github.com/iotaledger/hive.go/runtime/syncutils"
"github.com/iotaledger/hive.go/serializer/v2"
"github.com/iotaledger/hive.go/serializer/v2/stream"
iotago "github.com/iotaledger/iota.go/v4"
)
// Accounts represent a collection of accounts and their pools.
type Accounts struct {
accountPools *shrinkingmap.ShrinkingMap[iotago.AccountID, *Pool]
totalStake iotago.BaseToken
totalValidatorStake iotago.BaseToken
reused atomic.Bool
mutex syncutils.RWMutex
}
// NewAccounts creates a new Weights instance.
func NewAccounts() *Accounts {
return &Accounts{
accountPools: shrinkingmap.New[iotago.AccountID, *Pool](),
}
}
func (a *Accounts) Has(id iotago.AccountID) bool {
return a.accountPools.Has(id)
}
func (a *Accounts) Size() int {
return a.accountPools.Size()
}
func (a *Accounts) IDs() []iotago.AccountID {
a.mutex.RLock()
defer a.mutex.RUnlock()
ids := make([]iotago.AccountID, 0, a.accountPools.Size())
a.accountPools.ForEachKey(func(id iotago.AccountID) bool {
ids = append(ids, id)
return true
})
return ids
}
func (a *Accounts) IsReused() bool {
return a.reused.Load()
}
func (a *Accounts) SetReused() {
a.reused.Store(true)
}
// Get returns the weight of the given identity.
func (a *Accounts) Get(id iotago.AccountID) (pool *Pool, exists bool) {
return a.accountPools.Get(id)
}
// setWithoutLocking sets the weight of the given identity.
func (a *Accounts) setWithoutLocking(id iotago.AccountID, pool *Pool) error {
value, created := a.accountPools.GetOrCreate(id, func() *Pool {
return pool
})
var safeMathErr error
if !created {
// if there was already an entry, we need to subtract the former
// stake first and set the new value
if a.totalStake, safeMathErr = safemath.SafeSub(a.totalStake, value.PoolStake); safeMathErr != nil {
return ierrors.Wrapf(safeMathErr, "failed to subtract pool stake from total stake for account %s", id.String())
}
if a.totalValidatorStake, safeMathErr = safemath.SafeSub(a.totalValidatorStake, value.ValidatorStake); safeMathErr != nil {
return ierrors.Wrapf(safeMathErr, "failed to subtract validator stake from total validator stake for account %s", id.String())
}
a.accountPools.Set(id, pool)
}
if a.totalStake, safeMathErr = safemath.SafeAdd(a.totalStake, pool.PoolStake); safeMathErr != nil {
return ierrors.Wrapf(safeMathErr, "failed to add pool stake to total stake for account %s", id.String())
}
if a.totalValidatorStake, safeMathErr = safemath.SafeAdd(a.totalValidatorStake, pool.ValidatorStake); safeMathErr != nil {
return ierrors.Wrapf(safeMathErr, "failed to add validator stake to total validator stake for account %s", id.String())
}
return nil
}
// Set sets the weight of the given identity.
func (a *Accounts) Set(id iotago.AccountID, pool *Pool) error {
a.mutex.Lock()
defer a.mutex.Unlock()
return a.setWithoutLocking(id, pool)
}
func (a *Accounts) TotalStake() iotago.BaseToken {
a.mutex.RLock()
defer a.mutex.RUnlock()
return a.totalStake
}
func (a *Accounts) TotalValidatorStake() iotago.BaseToken {
a.mutex.RLock()
defer a.mutex.RUnlock()
return a.totalValidatorStake
}
// ForEach iterates over all weights and calls the given callback for each of them.
func (a *Accounts) ForEach(callback func(id iotago.AccountID, pool *Pool) bool) {
a.accountPools.ForEach(callback)
}
// SeatedAccounts creates a new SeatedAccounts instance, that maintains the seats of the given members.
func (a *Accounts) SeatedAccounts(members ...iotago.AccountID) *SeatedAccounts {
return NewSeatedAccounts(a, members...)
}
func AccountsFromBytes(b []byte) (*Accounts, int, error) {
reader := stream.NewByteReader(b)
a, err := AccountsFromReader(reader)
if err != nil {
return nil, 0, ierrors.Wrap(err, "unable to read accounts from bytes")
}
return a, reader.BytesRead(), nil
}
func AccountsFromReader(reader io.Reader) (*Accounts, error) {
a := NewAccounts()
if err := stream.ReadCollection(reader, serializer.SeriLengthPrefixTypeAsUint32, func(i int) error {
accountID, err := stream.Read[iotago.AccountID](reader)
if err != nil {
return ierrors.Wrapf(err, "unable to read accountID at index %d", i)
}
pool, err := stream.ReadObject(reader, poolBytesLength, PoolFromBytes)
if err != nil {
return ierrors.Wrapf(err, "unable to read pool at index %d", i)
}
if err := a.setWithoutLocking(accountID, pool); err != nil {
return ierrors.Wrapf(err, "failed to set pool for account %s", accountID.String())
}
return nil
}); err != nil {
return nil, ierrors.Wrap(err, "failed to read account data")
}
reused, err := stream.Read[bool](reader)
if err != nil {
return nil, ierrors.Wrap(err, "failed to read reused flag")
}
a.reused.Store(reused)
return a, nil
}
func (a *Accounts) Bytes() ([]byte, error) {
a.mutex.RLock()
defer a.mutex.RUnlock()
byteBuffer := stream.NewByteBuffer()
if err := stream.WriteCollection(byteBuffer, serializer.SeriLengthPrefixTypeAsUint32, func() (elementsCount int, err error) {
var innerErr error
a.ForEach(func(id iotago.AccountID, pool *Pool) bool {
if innerErr = stream.Write(byteBuffer, id); innerErr != nil {
return false
}
if innerErr = stream.WriteObject(byteBuffer, pool, (*Pool).Bytes); innerErr != nil {
return false
}
return true
})
if innerErr != nil {
return 0, innerErr
}
return a.accountPools.Size(), nil
}); err != nil {
return nil, ierrors.Wrap(err, "failed to write accounts")
}
if err := stream.Write(byteBuffer, a.reused.Load()); err != nil {
return nil, ierrors.Wrap(err, "failed to write reused flag")
}
return byteBuffer.Bytes()
}