76 lines
2.5 KiB
TypeScript
76 lines
2.5 KiB
TypeScript
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/**
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* Step 3 — Coin module: network layer (explorer/RPC wrapper)
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* Target: ledger-live libs/coin-modules/coin-ethereum (or coin-defi_oracle_meta) src/network/
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*
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* Wraps Chain 138 RPC and Blockscout for sync, history, fees. Use in bridge.
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*/
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const RPC_URL = "https://rpc-http-pub.d-bis.org";
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const EXPLORER_API = "https://explorer.d-bis.org/api";
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export async function getLastBlock(): Promise<number> {
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const res = await fetch(RPC_URL, {
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method: "POST",
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headers: { "Content-Type": "application/json" },
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body: JSON.stringify({ jsonrpc: "2.0", id: 1, method: "eth_blockNumber", params: [] }),
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});
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const data = await res.json();
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return parseInt(data.result, 16);
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}
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export async function getBalance(address: string): Promise<string> {
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const res = await fetch(RPC_URL, {
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method: "POST",
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headers: { "Content-Type": "application/json" },
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body: JSON.stringify({
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jsonrpc: "2.0",
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id: 1,
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method: "eth_getBalance",
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params: [address, "latest"],
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}),
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});
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const data = await res.json();
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return data.result ?? "0x0";
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}
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export async function getTransactionCount(address: string): Promise<number> {
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const res = await fetch(RPC_URL, {
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method: "POST",
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headers: { "Content-Type": "application/json" },
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body: JSON.stringify({
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jsonrpc: "2.0",
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id: 1,
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method: "eth_getTransactionCount",
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params: [address, "latest"],
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}),
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});
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const data = await res.json();
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return parseInt(data.result ?? "0x0", 16);
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}
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/**
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* Explorer: get transactions for address.
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* Blockscout REST v2: GET /api/v2/addresses/{address_hash}/transactions
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* Response: { items: Tx[], next_page_params?: { block_number, index, items_count } }
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*/
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const EXPLORER_API_V2 = "https://explorer.d-bis.org/api/v2";
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export async function getAddressTransactions(
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address: string,
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params?: { block_number?: number; index?: number; items_count?: number }
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): Promise<{ items: unknown[]; next_page_params?: { block_number: number; index: number; items_count: number } }> {
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let url = `${EXPLORER_API_V2}/addresses/${encodeURIComponent(address)}/transactions`;
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if (params?.block_number != null && params?.index != null && params?.items_count != null) {
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url += `?block_number=${params.block_number}&index=${params.index}&items_count=${params.items_count}`;
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}
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const res = await fetch(url);
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if (!res.ok) return { items: [] };
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const data = await res.json();
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return {
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items: data.items ?? [],
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next_page_params: data.next_page_params,
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};
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}
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export { RPC_URL, EXPLORER_API, EXPLORER_API_V2 };
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