viem
Version:
129 lines • 4.47 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.offchainLookupAbiItem = exports.offchainLookupSignature = void 0;
exports.offchainLookup = offchainLookup;
exports.ccipRequest = ccipRequest;
const call_js_1 = require("../actions/public/call.js");
const ccip_js_1 = require("../errors/ccip.js");
const request_js_1 = require("../errors/request.js");
const decodeErrorResult_js_1 = require("./abi/decodeErrorResult.js");
const encodeAbiParameters_js_1 = require("./abi/encodeAbiParameters.js");
const isAddressEqual_js_1 = require("./address/isAddressEqual.js");
const concat_js_1 = require("./data/concat.js");
const isHex_js_1 = require("./data/isHex.js");
const stringify_js_1 = require("./stringify.js");
exports.offchainLookupSignature = '0x556f1830';
exports.offchainLookupAbiItem = {
name: 'OffchainLookup',
type: 'error',
inputs: [
{
name: 'sender',
type: 'address',
},
{
name: 'urls',
type: 'string[]',
},
{
name: 'callData',
type: 'bytes',
},
{
name: 'callbackFunction',
type: 'bytes4',
},
{
name: 'extraData',
type: 'bytes',
},
],
};
async function offchainLookup(client, { blockNumber, blockTag, data, to, }) {
const { args } = (0, decodeErrorResult_js_1.decodeErrorResult)({
data,
abi: [exports.offchainLookupAbiItem],
});
const [sender, urls, callData, callbackSelector, extraData] = args;
const { ccipRead } = client;
const ccipRequest_ = ccipRead && typeof ccipRead?.request === 'function'
? ccipRead.request
: ccipRequest;
try {
if (!(0, isAddressEqual_js_1.isAddressEqual)(to, sender))
throw new ccip_js_1.OffchainLookupSenderMismatchError({ sender, to });
const result = await ccipRequest_({ data: callData, sender, urls });
const { data: data_ } = await (0, call_js_1.call)(client, {
blockNumber,
blockTag,
data: (0, concat_js_1.concat)([
callbackSelector,
(0, encodeAbiParameters_js_1.encodeAbiParameters)([{ type: 'bytes' }, { type: 'bytes' }], [result, extraData]),
]),
to,
});
return data_;
}
catch (err) {
throw new ccip_js_1.OffchainLookupError({
callbackSelector,
cause: err,
data,
extraData,
sender,
urls,
});
}
}
async function ccipRequest({ data, sender, urls, }) {
let error = new Error('An unknown error occurred.');
for (let i = 0; i < urls.length; i++) {
const url = urls[i];
const method = url.includes('{data}') ? 'GET' : 'POST';
const body = method === 'POST' ? { data, sender } : undefined;
const headers = method === 'POST' ? { 'Content-Type': 'application/json' } : {};
try {
const response = await fetch(url.replace('{sender}', sender.toLowerCase()).replace('{data}', data), {
body: JSON.stringify(body),
headers,
method,
});
let result;
if (response.headers.get('Content-Type')?.startsWith('application/json')) {
result = (await response.json()).data;
}
else {
result = (await response.text());
}
if (!response.ok) {
error = new request_js_1.HttpRequestError({
body,
details: result?.error
? (0, stringify_js_1.stringify)(result.error)
: response.statusText,
headers: response.headers,
status: response.status,
url,
});
continue;
}
if (!(0, isHex_js_1.isHex)(result)) {
error = new ccip_js_1.OffchainLookupResponseMalformedError({
result,
url,
});
continue;
}
return result;
}
catch (err) {
error = new request_js_1.HttpRequestError({
body,
details: err.message,
url,
});
}
}
throw error;
}
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