Balancer provides guidance with the task of rebalancing assets.
Let's assume the current price of 1 BTC is $5000 and the current price of 1 ETH is $200.
First set the global pricelist to reflect these prices:
err := SetPricelist(Pricelist{
"ETH": decimal.NewFromFloat(200),
"BTC": decimal.NewFromFloat(5000),
})
if err != nil {
log.Fatalf("unexpected error whilst setting pricelist: %v", err)
}If you're holding 20 ETH and 0.5 BTC, you can model your account like this:
account, err := NewAccount(Holdings{
"ETH": decimal.NewFromFloat(20),
"BTC": decimal.NewFromFloat(0.5),
})
if err != nil {
log.Fatalf("unexpected error whilst creating account: %v", err)
}The current value of all your assets is:
0.5 x 5000 + 20 x 200 = 6500
The current percentage of each asset is:
ETH = 20 * 200 / 6500 = 0.615384...
BTC = 0.5 * 5000 / 6500 = 0.384615...
If you wanted to change this to a 50/50 split, we need to model a target index:
targetIndex := Index{
"ETH": decimal.NewFromFloat(0.5),
"BTC": decimal.NewFromFloat(0.5),
})You can then pass targetIndex to your account.Balance() and you'll receive the trades necessary to rebalance your
holdings as a map[Asset]Trade.
requiredTrades, err := account.Balance(targetIndex)
if err != nil {
log.Fatalf("unexpected error whilst balancing account: %v", err)
}
for asset, trade := range requiredTrades {
fmt.Printf("%s %s %s\n", trade.Action, trade.Amount, asset)
}
// Unordered output:
// sell 3.75 ETH
// buy 0.15 BTCYou can also balance your current holdings into other new assets, as long as these new assets are included in the global pricelist:
err := SetPricelist(Pricelist{
"ETH": decimal.NewFromFloat(200),
"BTC": decimal.NewFromFloat(2000),
"IOTA": decimal.NewFromFloat(0.3),
"BAT": decimal.NewFromFloat(0.12),
"XLM": decimal.NewFromFloat(0.2),
})
if err != nil {
log.Fatalf("unexpected error whilst setting pricelist: %v", err)
}
account, err := NewAccount(Holdings{
"ETH": decimal.NewFromFloat(42),
})
if err != nil {
log.Fatalf("unexpected error whilst creating account: %v", err)
}
targetIndex := Index{
"ETH": decimal.NewFromFloat(0.2),
"BTC": decimal.NewFromFloat(0.2),
"IOTA": decimal.NewFromFloat(0.2),
"BAT": decimal.NewFromFloat(0.2),
"XLM": decimal.NewFromFloat(0.2),
}
requiredTrades, err := account.Balance(targetIndex)
if err != nil {
log.Fatalf("unexpected error whilst balancing account: %v", err)
}
for asset, trade := range requiredTrades {
fmt.Printf("%s %s %s\n", trade.Action, trade.Amount, asset)
}
// Unordered output:
// sell 33.6 ETH
// buy 0.84 BTC
// buy 5600 IOTA
// buy 14000 BAT
// buy 8400 XLM
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent