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launchpad-ledger: Use HD path helpers

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This commit is contained in:
willclarktech 2020-09-10 12:27:29 +02:00
parent f071b8d25d
commit 521fdcc2ab
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2 changed files with 15 additions and 7 deletions
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19
packages/launchpad-ledger/src/launchpadledger.ts
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@ -1,5 +1,6 @@
import { Secp256k1Signature } from "@cosmjs/crypto";
import { Secp256k1Signature, Slip10RawIndex } from "@cosmjs/crypto";
import { fromUtf8 } from "@cosmjs/encoding";
import { makeCosmoshubPath } from "@cosmjs/launchpad";
import { assert } from "@cosmjs/utils";
import Transport from "@ledgerhq/hw-transport";
import TransportWebUsb from "@ledgerhq/hw-transport-webusb";
@ -58,12 +59,16 @@ async function createTransport(timeout: number): Promise<Transport> {
}
}
const cosmosHdPath = [44, 118, 0, 0, 0];
function unharden(hdPath: readonly Slip10RawIndex[]): number[] {
return hdPath.map((n) => (n.isHardened() ? n.toNumber() - 2 ** 31 : n.toNumber()));
}
const cosmosHdPath = makeCosmoshubPath(0);
const cosmosBech32Prefix = "cosmos";
export class LaunchpadLedger {
private readonly testModeAllowed: boolean;
private readonly hdPath: number[];
private readonly hdPath: readonly Slip10RawIndex[];
private readonly prefix: string;
private cosmosApp: CosmosApp | null;
public readonly platform: string;
@ -71,7 +76,7 @@ export class LaunchpadLedger {
constructor(
{ testModeAllowed }: { testModeAllowed: boolean } = { testModeAllowed: false },
hdPath: number[] = cosmosHdPath,
hdPath: readonly Slip10RawIndex[] = cosmosHdPath,
prefix: string = cosmosBech32Prefix,
) {
this.testModeAllowed = testModeAllowed;
@ -123,7 +128,8 @@ export class LaunchpadLedger {
await this.connect();
assert(this.cosmosApp, "Cosmos Ledger App is not connected");
const response = await this.cosmosApp.publicKey(this.hdPath);
// ledger-cosmos-js hardens the first three indices
const response = await this.cosmosApp.publicKey(unharden(this.hdPath));
this.handleLedgerErrors(response);
return (response as PublicKeyResponse).compressed_pk;
}
@ -147,7 +153,8 @@ export class LaunchpadLedger {
await this.connect();
assert(this.cosmosApp, "Cosmos Ledger App is not connected");
const response = await this.cosmosApp.sign(this.hdPath, fromUtf8(message));
// ledger-cosmos-js hardens the first three indices
const response = await this.cosmosApp.sign(unharden(this.hdPath), fromUtf8(message));
this.handleLedgerErrors(response, {
rejectionMessage: "Transaction signing request was rejected by the user",
});

3
packages/launchpad-ledger/types/launchpadledger.d.ts vendored
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@ -1,4 +1,5 @@
/// <reference types="node" />
import { Slip10RawIndex } from "@cosmjs/crypto";
export declare class LaunchpadLedger {
private readonly testModeAllowed;
private readonly hdPath;
@ -12,7 +13,7 @@ export declare class LaunchpadLedger {
}?: {
testModeAllowed: boolean;
},
hdPath?: number[],
hdPath?: readonly Slip10RawIndex[],
prefix?: string,
);
connect(timeout?: number): Promise<LaunchpadLedger>;