This task was abandoned by me two or three several years ago. Elementary security troubles during the generation of private keys are brought to my awareness. See: #61 EthereumHDKeysGenerator generates private keys and addresses for ethereum accounts based on mnemonic and hd route Folder vanity-eth-moreover are going to be created https://webdirectoryone.com/listings12703231/not-known-facts-about-trx-wallet-address-generator