// NFT version
internal bool BurnToken(string symbol, StorageContext storage, Address target, BigInteger tokenID)
{
if (!TokenExists(symbol))
{
return(false);
}
var tokenInfo = GetTokenInfo(symbol);
if (tokenInfo.Flags.HasFlag(TokenFlags.Fungible))
{
return(false);
}
var chain = RootChain;
var supply = new SupplySheet(symbol, chain, this);
if (!supply.Burn(storage, 1))
{
return(false);
}
var ownerships = new OwnershipSheet(symbol);
if (!ownerships.Take(storage, target, tokenID))
{
return(false);
}
return(true);
}
// NFT version
internal bool BurnToken(RuntimeVM runtimeVM, string symbol, Address target, BigInteger tokenID)
{
if (!TokenExists(symbol))
{
return(false);
}
var tokenInfo = GetTokenInfo(symbol);
if (tokenInfo.Flags.HasFlag(TokenFlags.Fungible))
{
return(false);
}
var chain = RootChain;
var supply = new SupplySheet(symbol, chain, this);
if (!supply.Burn(runtimeVM.ChangeSet, 1))
{
return(false);
}
var ownerships = new OwnershipSheet(symbol);
if (!ownerships.Take(runtimeVM.ChangeSet, target, tokenID))
{
return(false);
}
var tokenTriggerResult = SmartContract.InvokeTrigger(runtimeVM, tokenInfo.Script, TokenContract.TriggerBurn, target, tokenID);
if (!tokenTriggerResult)
{
return(false);
}
var accountScript = this.LookUpAddressScript(target);
var accountTriggerResult = SmartContract.InvokeTrigger(runtimeVM, accountScript, AccountContract.TriggerBurn, target, tokenID);
if (!accountTriggerResult)
{
return(false);
}
return(true);
}
internal bool TransferToken(string symbol, StorageContext storage, Chain chain, Address source, Address destination, BigInteger tokenID)
{
if (!TokenExists(symbol))
{
return(false);
}
var tokenInfo = GetTokenInfo(symbol);
if (!tokenInfo.Flags.HasFlag(TokenFlags.Transferable))
{
throw new Exception("Not transferable");
}
if (tokenInfo.Flags.HasFlag(TokenFlags.Fungible))
{
throw new Exception("Should be non-fungible");
}
if (tokenID <= 0)
{
return(false);
}
var ownerships = new OwnershipSheet(symbol);
if (!ownerships.Take(storage, source, tokenID))
{
return(false);
}
if (!ownerships.Give(storage, destination, tokenID))
{
return(false);
}
EditNFTLocation(symbol, tokenID, chain.Address, destination);
return(true);
}
internal bool TransferToken(RuntimeVM runtimeVM, string symbol, Address source, Address destination, BigInteger tokenID)
{
if (!TokenExists(symbol))
{
return(false);
}
var tokenInfo = GetTokenInfo(symbol);
if (!tokenInfo.Flags.HasFlag(TokenFlags.Transferable))
{
throw new Exception("Not transferable");
}
if (tokenInfo.Flags.HasFlag(TokenFlags.Fungible))
{
throw new Exception("Should be non-fungible");
}
if (tokenID <= 0)
{
return(false);
}
var ownerships = new OwnershipSheet(symbol);
if (!ownerships.Take(runtimeVM.ChangeSet, source, tokenID))
{
return(false);
}
if (!ownerships.Give(runtimeVM.ChangeSet, destination, tokenID))
{
return(false);
}
var tokenTriggerResult = SmartContract.InvokeTrigger(runtimeVM, tokenInfo.Script, TokenContract.TriggerSend, source, tokenID);
if (!tokenTriggerResult)
{
return(false);
}
tokenTriggerResult = SmartContract.InvokeTrigger(runtimeVM, tokenInfo.Script, TokenContract.TriggerReceive, destination, tokenID);
if (!tokenTriggerResult)
{
return(false);
}
var accountScript = this.LookUpAddressScript(source);
var accountTriggerResult = SmartContract.InvokeTrigger(runtimeVM, accountScript, AccountContract.TriggerSend, source, tokenID);
if (!accountTriggerResult)
{
return(false);
}
accountScript = this.LookUpAddressScript(destination);
accountTriggerResult = SmartContract.InvokeTrigger(runtimeVM, accountScript, AccountContract.TriggerSend, destination, tokenID);
if (!accountTriggerResult)
{
return(false);
}
EditNFTLocation(symbol, tokenID, runtimeVM.Chain.Address, destination);
return(true);
}