31 lines
1.1 KiB
TypeScript
31 lines
1.1 KiB
TypeScript
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/**
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* Step 2 — Device app lib (JS bindings)
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* For EVM/Chain 138 we use existing @ledgerhq/hw-app-eth. No new package needed.
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* Ensure chainId 138 is passed when building/signing transactions.
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*
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* Example usage in coin-module or live-common (signer/bridge):
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*/
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import Eth from "@ledgerhq/hw-app-eth";
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const CHAIN_ID_138 = 138;
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// When getting address (path is BIP44 EVM: 44'/60'/0'/0/0)
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async function getAddress(
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transport: { send: (cla: number, ins: number, p1: number, p2: number, data?: Buffer) => Promise<Buffer> },
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path: string,
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display?: boolean
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) {
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const eth = new Eth(transport);
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const result = await eth.getAddress(path, display ?? false);
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return { address: result.address, publicKey: result.publicKey, path };
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}
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// When signing a transaction, the serialized tx must include chainId 138 (EIP-155)
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// so the device shows "Defi Oracle Meta" and signs correctly.
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function buildTxWithChainId(tx: { chainId?: number; [k: string]: unknown }) {
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return { ...tx, chainId: tx.chainId ?? CHAIN_ID_138 };
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}
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export { getAddress, buildTxWithChainId, CHAIN_ID_138 };
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