Contract con_lamden_realm_v3

  

    

      

        

            
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I = importlib
          

            
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collection_name = Variable()
          

            
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collection_owner = Variable()
          

            
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collection_nfts = Hash(default_value=0)
          

            
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collection_balances = Hash(default_value=0)
          

            
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collection_balances_approvals = Hash(default_value=0)
          

            
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crafting_contract = Variable()
          

            
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@construct
          

            
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def seed():
          

            
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    collection_name.set("The Lamden Realm")
          

            
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    collection_owner.set(ctx.caller)
          

            
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    crafting_contract.set("con_crafter_v9")
          

            
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@export
          

            
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def mint_nft(name: str, description: str, ipfs_image_url: str, metadata: dict, amount: int):
          

            
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    assert name != "", "Name cannot be empty"
          

            
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    assert collection_nfts[name] == 0, "Name already exists"
          

            
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    assert amount > 0, "You cannot transfer negative amounts"
          

            
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    assert collection_owner.get() == ctx.caller or ctx.caller == crafting_contract.get(), "Only the collection owner can mint NFTs"
          

            
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    collection_nfts[name] = {"description": description, "ipfs_image_url": ipfs_image_url, "metadata": metadata, "amount": amount}
          

            
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    collection_balances[ctx.caller, name] = amount
          

            
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@export
          

            
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def transfer(name: str, amount:int, to: str):
          

            
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    assert amount > 0, "You cannot transfer negative amounts"
          

            
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    assert name != "", "Please specify the name of the NFT you want to transfer"
          

            
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    assert collection_balances[ctx.caller, name] >= amount, "You dont have enough NFTs to send"
          

            
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    collection_balances[ctx.caller, name] -= amount
          

            
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    collection_balances[to, name] += amount # Adds amount to receiver
          

            
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@export
          

            
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def approve(amount: int, name: str, to: str):
          

            
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    assert amount > 0, "Cannot approve negative amounts"
          

            
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    collection_balances_approvals[ctx.caller, to, name] += amount 
          

            
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@export
          

            
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def transfer_from(name:str, amount:int, to: str, main_account: str):
          

            
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    assert amount > 0, "Cannot send negative balances!"
          

            
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    assert collection_balances_approvals[main_account, to, name] >= amount, "Not enough NFTs approved to send! You have {} and are trying to spend {}".format(collection_balances_approvals[main_account, to, name], amount)
          

            
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    assert collection_balances[main_account, name] >= amount, "Not enough NFTs to send!"
          

            
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    collection_balances_approvals[main_account, to, name] -= amount
          

            
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    collection_balances[main_account, name] -= amount
          

            
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    collection_balances[to, name] += amount
          

            
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@export
          

            
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def set_crafting_contract(contract: str):
          

            
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    assert ctx.caller == collection_owner.get(), "Only the collection owner can set the crafting contract"
          

            
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    crafting_contract.set(contract)
          

            
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