fix: use sdk.config hdpath (backport cosmos#10414) (cosmos#10445)

* fix: use sdk.config hdpath (cosmos#10414)

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Other cosmos-sdk based chains cannot reset hdpath on running `app testnet` command.

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(cherry picked from commit 33737f4)

* Fix conflicts

Co-authored-by: NevermoreRandom <92708920+NevermoreRandom@users.noreply.github.com>
Co-authored-by: Amaury M <1293565+amaurym@users.noreply.github.com>

CHANGELOG.md

@@ -37,6 +37,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
+### Bug Fixes
+
+* [\#10414](https://github.com/cosmos/cosmos-sdk/pull/10414) Use `sdk.GetConfig().GetFullBIP44Path()` instead `sdk.FullFundraiserPath` to generate key
+
 ## [v0.44.3](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.44.3) - 2021-10-21
 
 ### Improvements

server/init.go

@@ -0,0 +1,52 @@
+package server
+
+import (
+	"fmt"
+
+	"github.com/cosmos/cosmos-sdk/crypto/keyring"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+// GenerateCoinKey returns the address of a public key, along with the secret
+// phrase to recover the private key.
+func GenerateCoinKey(algo keyring.SignatureAlgo) (sdk.AccAddress, string, error) {
+	// generate a private key, with recovery phrase
+	info, secret, err := keyring.NewInMemory().NewMnemonic("name", keyring.English, sdk.GetConfig().GetFullBIP44Path(), keyring.DefaultBIP39Passphrase, algo)
+	if err != nil {
+		return sdk.AccAddress([]byte{}), "", err
+	}
+	return sdk.AccAddress(info.GetPubKey().Address()), secret, nil
+}
+
+// GenerateSaveCoinKey returns the address of a public key, along with the secret
+// phrase to recover the private key.
+func GenerateSaveCoinKey(keybase keyring.Keyring, keyName string, overwrite bool, algo keyring.SignatureAlgo) (sdk.AccAddress, string, error) {
+	exists := false
+	_, err := keybase.Key(keyName)
+	if err == nil {
+		exists = true
+	}
+
+	// ensure no overwrite
+	if !overwrite && exists {
+		return sdk.AccAddress([]byte{}), "", fmt.Errorf(
+			"key already exists, overwrite is disabled")
+	}
+
+	// generate a private key, with recovery phrase
+	if exists {
+		err = keybase.Delete(keyName)
+		if err != nil {
+			return sdk.AccAddress([]byte{}), "", fmt.Errorf(
+				"failed to overwrite key")
+		}
+	}
+
+	info, secret, err := keybase.NewMnemonic(keyName, keyring.English, sdk.GetConfig().GetFullBIP44Path(), keyring.DefaultBIP39Passphrase, algo)
+	if err != nil {
+		return sdk.AccAddress([]byte{}), "", err
+	}
+
+	return sdk.AccAddress(info.GetPubKey().Address()), secret, nil
+}