feat(context-module): add external plugin loader

libs/ledgerjs/packages/context-module/src/external-plugin/data/DappResponse.ts

@@ -0,0 +1,40 @@
+export interface DappResponse {
+  b2c: B2c;
+  abis: Abis;
+  b2c_signatures: B2cSignatures;
+}
+
+export interface B2c {
+  blockchainName: string;
+  chainId: number;
+  contracts: Contract[];
+  name: string;
+}
+
+interface Contract {
+  address: string;
+  contractName: string;
+  selectors: { [selector: string]: ContractSelector };
+}
+
+interface ContractSelector {
+  erc20OfInterest: string[];
+  method: string;
+  plugin: string;
+}
+
+interface Abis {
+  [address: string]: object;
+}
+
+export interface B2cSignatures {
+  [address: string]: {
+    [selector: string]: B2cSignature;
+  };
+}
+
+interface B2cSignature {
+  plugin: string;
+  serialized_data: string;
+  signature: string;
+}

libs/ledgerjs/packages/context-module/src/external-plugin/data/ExternalPluginDataSource.ts

@@ -0,0 +1,11 @@
+import { DappInfos } from "../model/DappInfos";
+
+export type GetDappInfos = {
+  address: string;
+  selector: `0x${string}`;
+  chainId: number;
+};
+
+export interface ExternalPluginDataSource {
+  getDappInfos(params: GetDappInfos): Promise<DappInfos | undefined>;
+}

libs/ledgerjs/packages/context-module/src/external-plugin/data/HttpExternalPluginDataSource.ts

@@ -0,0 +1,42 @@
+import axios from "axios";
+import { ExternalPluginDataSource, GetDappInfos } from "./ExternalPluginDataSource";
+import { DappResponse } from "./DappResponse";
+import { DappInfos } from "../model/DappInfos";
+import { SelectorDetails } from "../model/SelectorDetails";
+
+export class HttpExternalPluginDataSource implements ExternalPluginDataSource {
+  constructor() {}
+
+  async getDappInfos({ chainId, address, selector }: GetDappInfos): Promise<DappInfos | undefined> {
+    const dappInfos = await axios.request<DappResponse[]>({
+      method: "GET",
+      url: "https://crypto-assets-service.api.ledger.com/v1/dapps",
+      params: { output: "b2c,b2c_signatures,abis", chain_id: chainId, contracts: address },
+    });
+
+    const { erc20OfInterest, method, plugin } =
+      dappInfos.data[0]?.b2c.contracts?.[0]?.selectors?.[selector] || {};
+    const { signature, serialized_data: serializedData } =
+      dappInfos.data[0]?.b2c_signatures?.[address]?.[selector] || {};
+
+    if (!erc20OfInterest || !method || !plugin || !signature || !serializedData) {
+      return;
+    }
+
+    const abi = dappInfos.data[0]?.abis?.[address];
+
+    if (!abi) {
+      return;
+    }
+
+    const selectorDetails: SelectorDetails = {
+      method,
+      plugin,
+      erc20OfInterest,
+      signature,
+      serializedData,
+    };
+
+    return { selectorDetails, abi: JSON.stringify(abi) };
+  }
+}