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gatsby-node.js
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gatsby-node.js
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const { createRemoteFileNode } = require("gatsby-source-filesystem");
const fetch = require("node-fetch");
exports.sourceNodes = async ({
actions,
createNodeId,
createContentDigest,
store,
cache,
reporter,
}) => {
const { createNode } = actions;
const chains = await fetch("https://chainid.network/chains.json").then(
(response) => response.json()
);
const icons = await fetch("https://chainid.network/chain_icons.json").then(
(response) => response.json()
);
async function fetchIcon(name, file) {
const cid = file.url.slice(7);
// Try iconsDownload first as it is way faster.
try {
return await createRemoteFileNode({
url: `https://chainid.network/iconsDownload/${cid}`,
createNode,
createNodeId,
store,
cache,
reporter,
name,
ext: `.${file.format}`,
});
} catch {}
// Fallback to IPFS
try {
return await createRemoteFileNode({
url: `https://ipfs.io/ipfs/${cid}`,
createNode,
createNodeId,
store,
cache,
reporter,
name,
ext: `.${file.format}`,
});
} catch {}
return null;
}
const iconFiles = await icons.reduce(async (previousPromise, icon) => {
const iconName = icon.name;
const iconFile = icon.icons?.[0];
const result = await fetchIcon(iconName, iconFile);
const acc = await previousPromise;
if (result) {
acc[iconName] = result;
}
return acc;
}, Promise.resolve({}));
chains
.filter((chain) => chain.rpc.length > 0)
.forEach((chain) => {
const icon = chain.icon;
const iconFileId = iconFiles[icon]?.id;
const chainData = { ...chain, icon: iconFileId };
const node = {
...chainData,
parent: null,
children: [],
id: createNodeId(`chain__${chainData.chainId}`),
internal: {
type: "Chain",
content: JSON.stringify(chainData),
contentDigest: createContentDigest(chainData),
},
};
createNode(node);
});
};
exports.createSchemaCustomization = ({ actions }) => {
const { createTypes } = actions;
const typeDefs = `
type Chain implements Node {
icon: File @link(from: "icon")
}
`;
createTypes(typeDefs);
};