neo-go/pkg/rpc/server/testdata/test_contract.go
Roman Khimov d81d826bfc core: fix Storage.Get to return Null when there is no value
Match C# implementation and fix state inconsistency at block 249920 of
preview2 testnet. Make our Go Storage.Get return nil and adapt
examples/tests.
2020-06-24 10:43:58 +03:00

93 lines
1.9 KiB
Go

package testdata
import (
"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
"github.com/nspcc-dev/neo-go/pkg/interop/storage"
)
const (
totalSupply = 1000000
decimals = 2
)
func Main(operation string, args []interface{}) interface{} {
runtime.Notify("contract call", operation, args)
switch operation {
case "Put":
ctx := storage.GetContext()
storage.Put(ctx, args[0].([]byte), args[1].([]byte))
return true
case "totalSupply":
return totalSupply
case "decimals":
return decimals
case "name":
return "Rubl"
case "symbol":
return "RUB"
case "balanceOf":
ctx := storage.GetContext()
addr := args[0].([]byte)
if len(addr) != 20 {
runtime.Log("invalid address")
return false
}
var amount int
val := storage.Get(ctx, addr)
if val != nil {
amount = val.(int)
}
runtime.Notify("balanceOf", addr, amount)
return amount
case "transfer":
ctx := storage.GetContext()
from := args[0].([]byte)
if len(from) != 20 {
runtime.Log("invalid 'from' address")
return false
}
to := args[1].([]byte)
if len(to) != 20 {
runtime.Log("invalid 'to' address")
return false
}
amount := args[2].(int)
if amount < 0 {
runtime.Log("invalid amount")
return false
}
var fromBalance int
val := storage.Get(ctx, from)
if val != nil {
fromBalance = val.(int)
}
if fromBalance < amount {
runtime.Log("insufficient funds")
return false
}
fromBalance -= amount
storage.Put(ctx, from, fromBalance)
var toBalance int
val = storage.Get(ctx, to)
if val != nil {
toBalance = val.(int)
}
toBalance += amount
storage.Put(ctx, to, toBalance)
runtime.Notify("transfer", from, to, amount)
return true
case "init":
ctx := storage.GetContext()
h := runtime.GetExecutingScriptHash()
amount := totalSupply
storage.Put(ctx, h, amount)
runtime.Notify("transfer", []byte{}, h, amount)
return true
default:
panic("invalid operation")
}
}