43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
package signer
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import (
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"github.com/cosmos/cosmos-sdk/crypto/keys/hd"
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ctypes "github.com/cosmos/cosmos-sdk/types"
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bip39 "github.com/cosmos/go-bip39"
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"github.com/tendermint/tendermint/crypto"
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"github.com/tendermint/tendermint/crypto/secp256k1"
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)
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type HdSigner struct {
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privKey secp256k1.PrivKeySecp256k1
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address ctypes.AccAddress
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}
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func NewHdSignerFromMnemonic(mnemonic string) (*HdSigner, error) {
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seed, err := bip39.NewSeedWithErrorChecking(mnemonic, "")
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if err != nil {
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return nil, err
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}
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masterPriv, ch := hd.ComputeMastersFromSeed(seed)
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params := hd.NewFundraiserParams(0, 0)
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derivedPriv, err := hd.DerivePrivateKeyForPath(masterPriv, ch, params.String())
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privKey := secp256k1.PrivKeySecp256k1(derivedPriv)
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return &HdSigner{
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privKey: privKey,
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address: ctypes.AccAddress(privKey.PubKey().Address()),
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}, nil
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}
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func (signer *HdSigner) Address() ctypes.AccAddress {
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return signer.address
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}
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func (signer *HdSigner) PubKey() crypto.PubKey {
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return signer.privKey.PubKey()
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}
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func (signer *HdSigner) Sign(bytes []byte) ([]byte, error) {
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return signer.privKey.Sign(bytes)
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}
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