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@pythnetwork/express-relay-evm-js
Advanced tools
Utilities for interacting with the express relay protocol
Utility library for interacting with the Pyth Express Relay API.
$ npm install --save @pythnetwork/express-relay-evm-js
$ yarn add @pythnetwork/express-relay-evm-js
To generate the latest type declarations from the server openapi schema, run:
npm run generate-api-types
import {
Client,
OpportunityParams,
BidParams,
} from "@pythnetwork/express-relay-evm-js";
function calculateOpportunityBid(opportunity: Opportunity): BidParams | null {
// searcher implementation here
// if the opportunity is not suitable for the searcher, return null
}
async function bidStatusCallback(bidStatus: BidStatusUpdate) {
console.log(`Bid status for bid ${bidStatus.id}: ${bidStatus.status.status}`);
}
async function opportunityCallback(opportunity: Opportunity) {
const bidParams = calculateOpportunityBid(opportunity);
if (bidParams === null) return;
const opportunityBid = await client.signOpportunityBid(
opportunity,
bidParams,
privateKey // searcher private key with appropriate permissions and assets
);
await client.submitOpportunityBid(opportunityBid);
}
const client = new Client(
{ baseUrl: "https://per-staging.dourolabs.app/" },
bidStatusCallback,
opportunityCallback
);
await client.subscribeChains([chain_id]); // chain id you want to subscribe to
There is an example searcher in examples directory.
This example fetches OpportunityParams
from the specified endpoint,
creates a fixed bid on each opportunity and signs them with the provided private key, and finally submits them back to the server. You can run it with
npm run simple-searcher
. A full command looks like this:
npm run simple-searcher -- \
--endpoint https://per-staging.dourolabs.app/ \
--chain-id op_sepolia \
--private-key <YOUR-PRIVATE-KEY>
Note that if you are using a localhost server at http://127.0.0.1
, you should specify --endpoint http://127.0.0.1:{PORT}
rather than http://localhost:{PORT}
, as Typescript maps localhost
to ::1
in line with IPv6 rather than to 127.0.0.1
as with IPv4.
FAQs
Utilities for interacting with the express relay protocol
The npm package @pythnetwork/express-relay-evm-js receives a total of 330 weekly downloads. As such, @pythnetwork/express-relay-evm-js popularity was classified as not popular.
We found that @pythnetwork/express-relay-evm-js demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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