Class: GenerativeERC721

Inherits:
ERC721
  • Object
show all
Defined in:
lib/rubysol/contracts/generative_erc721.rb

Instance Method Summary collapse

Methods inherited from ERC721

#_burn, #_exists, #_mint, #approve, #balanceOf, #ownerOf, #setApprovalForAll, #transferFrom

Instance Method Details

#constructor(name:, symbol:, generativeScript:, maxSupply:, description:, maxPerAddress:) ⇒ Object 



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# File 'lib/rubysol/contracts/generative_erc721.rb', line 11

def constructor(
  name:,
  symbol:,
  generativeScript:,
  maxSupply:,
  description:,
  maxPerAddress: )
  super(name: name, symbol: symbol)
  
  @maxSupply = maxSupply
  @maxPerAddress = maxPerAddress
  @description = description
  @generativeScript = generativeScript
end

#getHTML(seed) ⇒ Object 



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# File 'lib/rubysol/contracts/generative_erc721.rb', line 64

def getHTML( seed )
  %{<!DOCTYPE html>
  <html>
    <head>
      <style>
        body,
        html {
          width: 100%;
          height: 100%;
          margin: 0;
          padding: 0;
          overflow: hidden;
          display: block;
        }

        #canvas {
          position: absolute;
        }
      </style>
    </head>
    <body>
      <canvas id="canvas"></canvas>
    </body>
    <script>
      window.SEED = #{string(seed)};
      #{@generativeScript}
    </script>
  </html>}
end

#mint(amount) ⇒ Object 



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# File 'lib/rubysol/contracts/generative_erc721.rb', line 27

def mint( amount )
  assert(amount > 0, 'Amount must be positive')
  assert(amount + @_balanceOf[msg.sender] <= @maxPerAddress, 'Exceeded mint limit')
  assert(amount + @totalSupply <= @maxSupply, 'Exceeded max supply')
  
  hash = block.blockhash(block.number).cast(:uint256) % (2 ** 48)
  
  amount.times do |id|
    tokenId = @totalSupply + id
    seed = hash + tokenId
    
    @tokenIdToSeed[tokenId] = seed
    
    _mint(to: msg.sender, id: tokenId)
  end
  
  @totalSupply += amount
end

#tokenURI(id) ⇒ Object 



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# File 'lib/rubysol/contracts/generative_erc721.rb', line 47

def tokenURI( id )
  assert( _exists(id: id), 'ERC721Metadata: URI query for nonexistent token')
  
  html = getHTML(seed: @tokenIdToSeed[id])
  
  html_as_base_64_data_uri = "data:text/html;base64,#{Base64.strict_encode64(html)}"
  
  json_data = {
    name: "#{@name} ##{string(id)}",
    description: @description,
    animation_url: html_as_base_64_data_uri,
  }.to_json
  
  "data:application/json,#{json_data}"
end