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feat: print available accounts on startup
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| package hdaccount | ||
|
|
||
| import ( | ||
| "crypto/ecdsa" | ||
| "errors" | ||
|
|
||
| "github.com/btcsuite/btcd/btcutil/hdkeychain" | ||
| "github.com/btcsuite/btcd/chaincfg" | ||
| "github.com/ethereum/go-ethereum/accounts" | ||
| "github.com/ethereum/go-ethereum/common/hexutil" | ||
| "github.com/ethereum/go-ethereum/crypto" | ||
|
|
||
| "github.com/tyler-smith/go-bip39" | ||
| ) | ||
|
|
||
| type HdAccountStore struct { | ||
| mnemonic string | ||
| basePath accounts.DerivationPath | ||
| seed []byte | ||
| masterKey *hdkeychain.ExtendedKey | ||
| } | ||
|
|
||
| func NewHdAccountStore(mnemonic string, basePath accounts.DerivationPath) (*HdAccountStore, error) { | ||
| if mnemonic == "" { | ||
| return nil, errors.New("mnemonic is required") | ||
| } | ||
|
|
||
| if !bip39.IsMnemonicValid(mnemonic) { | ||
| return nil, errors.New("mnemonic is invalid") | ||
| } | ||
|
|
||
| seed, err := bip39.NewSeedWithErrorChecking(mnemonic, "") | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| masterKey, err := hdkeychain.NewMaster(seed, &chaincfg.MainNetParams) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return &HdAccountStore{mnemonic: mnemonic, basePath: basePath, seed: seed, masterKey: masterKey}, nil | ||
| } | ||
|
|
||
| func (h *HdAccountStore) derivePrivateKeyAt(index uint32) (*ecdsa.PrivateKey, error) { | ||
|
|
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| var key *hdkeychain.ExtendedKey | ||
| key = h.masterKey | ||
| for _, n := range h.derivationPathForIndex(index) { | ||
| derivedKey, err := key.Derive(n) | ||
|
|
||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| key = derivedKey | ||
| } | ||
|
|
||
| privateKey, err := key.ECPrivKey() | ||
| privateKeyECDSA := privateKey.ToECDSA() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return privateKeyECDSA, nil | ||
| } | ||
|
|
||
| func (h *HdAccountStore) derivePublicKeyAt(index uint32) (*ecdsa.PublicKey, error) { | ||
| privateKeyECDSA, err := h.derivePrivateKeyAt(index) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| publicKey := privateKeyECDSA.Public() | ||
| publicKeyECDSA, ok := publicKey.(*ecdsa.PublicKey) | ||
| if !ok { | ||
| return nil, errors.New("failed to get public key") | ||
| } | ||
|
|
||
| return publicKeyECDSA, nil | ||
| } | ||
|
|
||
| func (h *HdAccountStore) PrivateKeyHexAt(index uint32) (string, error) { | ||
| privateKey, err := h.derivePrivateKeyAt(index) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| return hexutil.Encode(crypto.FromECDSA(privateKey)), nil | ||
| } | ||
|
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||
| func (h *HdAccountStore) AddressHexAt(index uint32) (string, error) { | ||
| publicKey, err := h.derivePublicKeyAt(index) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| address := crypto.PubkeyToAddress(*publicKey) | ||
|
|
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| return address.Hex(), nil | ||
| } | ||
|
|
||
| func (h *HdAccountStore) derivationPathForIndex(index uint32) accounts.DerivationPath { | ||
| return accounts.DerivationPath(append(h.basePath, index)) | ||
| } |
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