Account functions

int eth_account_create(struct eth_account *dest, const uint8_t *entropy)

int eth_account_from_privkey(struct eth_account *dest, const uint8_t *privkey)

int eth_account_address_get(char *dest, const struct eth_account *src)

int eth_account_privkey_get(char *dest, const struct eth_account *src)

int eth_account_pubkey_get(char *dest, const struct eth_account *src)

int eth_account_sign(struct eth_signed *dest, const struct eth_account *account, const uint8_t *data, size_t len)