Imports github.com/btcsuite/btcd/btcec github.com/ethereum/go-ethereum/crypto github.com/ethereum/go-ethereum/params github.com/ontio/ontology-crypto/ec github.com/ontio/ontology-crypto/keypair github.com/ontio/ontology-crypto/sm2 github.com/polynetwork/poly/common Standard library imports bytes crypto/ed25519 crypto/elliptic encoding/hex math/big strings