fix priv key size
fix priv key size

bitjson/bitcore,bitjson/bitcore,bitpay/bitcore-wallet-service,bitjson/bitcore,bitpay/bitcore,bitpay/bitcore,bitjson/bitcore,bitpay/bitcore-wallet-service,martindale/bitcore,martindale/bitcore,martindale/bitcore,bitpay/bitcore,martindale/bitcore,bitpay/bitcore