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Certificates on Blockchain — Commodity Tokenization — Gold, Carbon Credits, and Renewable Energy Certificates on Blockchain
Physical commodities (gold, silver, oil) and environmental credits (carbon, RECs) are being tokenized at scale. Here is the technical architecture that distinguishes real commodity tokens from marketing claims. A genuine commodity token must satisfy: (1) the underlying commodity actually exists and is held by a trusted...
contract GoldToken is ERC20, Ownable { // 1 token = 1/100 troy ounce of gold (0.01 oz) // Allows smaller denominations for retail uint256 public constant GRAMS_PER_TOKEN = 311; // 1/10 oz = 3.11 grams address public custodian; // Vault operator authorized to mint/burn string public vaultLocation; // LBMA vault ID // Mi...
contract RECToken is ERC721 { // Each REC = 1 MWh of verified renewable generation struct REC { string generatorId; // EIA facility ID string fuelType; // Solar, Wind, Hydro, etc. string state; // US state of generation uint256 generationYear; // Vintage year uint256 generationMonth; bool retired; // True = credit used...
Common integrations: The Graph, Alchemy/Infura, OpenZeppelin Defender, and popular wallet providers.
Clarify requirements, compliance needs, architecture risks, and launch goals.
Implement core contracts, integrations, product flows, tests, and deployment automation.
Run QA, prepare audit handoff, deploy infrastructure, and support production rollout.
A carbon credit represents 1 metric ton of CO2 equivalent avoided or removed (e.g., a forest conservation project). A REC represents 1 MWh of renewable electricity generation. Both are environmental commodities, but they address different sustainability claims: carbon credits offset direct emissions; RECs support claims of renewable electricity use.
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