viem
Version:
40 lines • 1.26 kB
JavaScript
/**
* Filters a chain registry or array by structured criteria.
*
* @experimental
*
* @param parameters - Chain registry or array and criteria to filter by.
* @returns Matching chains.
*/
export function filterChains(parameters) {
const { chains, sort, testnet, token } = parameters;
const values = Array.isArray(chains) ? chains : Object.values(chains);
const filtered = [];
for (const chain of values) {
if (!isChain(chain))
continue;
if (token && !(chain.id in token.addresses))
continue;
if (testnet === true && chain.testnet !== true)
continue;
if (testnet === false && chain.testnet === true)
continue;
filtered.push(chain);
}
if (sort === 'id')
filtered.sort((a, b) => a.id - b.id);
if (sort === 'name')
filtered.sort((a, b) => a.name.localeCompare(b.name));
return filtered;
}
function isChain(chain) {
return (typeof chain === 'object' &&
chain !== null &&
'id' in chain &&
typeof chain.id === 'number' &&
'name' in chain &&
typeof chain.name === 'string' &&
'nativeCurrency' in chain &&
'rpcUrls' in chain);
}
//# sourceMappingURL=filterChains.js.map