nym/contracts/basic-bandwidth-generation/contractAddresses.json

{
    "rinkeby": {
        "NYM_ERC20":"",
        "BANDWIDTH_GENERATOR":"",
        "GRAVITY":"0xe58c12f8bA4a28e87841b10BdEdf80A47F86BA9B"
    }, 
    "mainnet": {
        "NYM_ERC20":"0xCf6DeE9947fdDc958985E5283e63d41CBC83Ff61",
        "BANDWIDTH_GENERATOR":"",
        "GRAVITY":"0xa4108aA1Ec4967F8b52220a4f7e94A8201F2D906"
    }
}