74 lines
1.2 KiB
Go
74 lines
1.2 KiB
Go
package common
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import (
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"math/big"
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"github.com/TrueCloudLab/frostfs-sdk-go/user"
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)
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type TransferTable struct {
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txs map[string]map[string]*TransferTx
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}
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type TransferTx struct {
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From, To user.ID
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Amount *big.Int
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}
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func NewTransferTable() *TransferTable {
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return &TransferTable{
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txs: make(map[string]map[string]*TransferTx),
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}
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}
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func (t *TransferTable) Transfer(tx *TransferTx) {
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if tx.From.Equals(tx.To) {
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return
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}
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from, to := tx.From.EncodeToString(), tx.To.EncodeToString()
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m, ok := t.txs[from]
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if !ok {
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if m, ok = t.txs[to]; ok {
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to = from // ignore `From = To` swap because `From` doesn't require
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tx.Amount.Neg(tx.Amount)
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} else {
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m = make(map[string]*TransferTx, 1)
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t.txs[from] = m
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}
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}
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tgt, ok := m[to]
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if !ok {
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m[to] = tx
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return
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}
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tgt.Amount.Add(tgt.Amount, tx.Amount)
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}
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func (t *TransferTable) Iterate(f func(*TransferTx)) {
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for _, m := range t.txs {
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for _, tx := range m {
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f(tx)
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}
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}
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}
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func TransferAssets(e Exchanger, t *TransferTable, details []byte) {
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t.Iterate(func(tx *TransferTx) {
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sign := tx.Amount.Sign()
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if sign == 0 {
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return
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}
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if sign < 0 {
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tx.From, tx.To = tx.To, tx.From
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tx.Amount.Neg(tx.Amount)
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}
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e.Transfer(tx.From, tx.To, tx.Amount, details)
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})
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}
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