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34 lines
1.4 KiB
34 lines
1.4 KiB
import mergeMiddleware from 'json-rpc-engine/src/mergeMiddleware'
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import createFetchMiddleware from 'eth-json-rpc-middleware/fetch'
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import createBlockRefRewriteMiddleware from 'eth-json-rpc-middleware/block-ref-rewrite'
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import createBlockCacheMiddleware from 'eth-json-rpc-middleware/block-cache'
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import createInflightMiddleware from 'eth-json-rpc-middleware/inflight-cache'
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import createBlockTrackerInspectorMiddleware from 'eth-json-rpc-middleware/block-tracker-inspector'
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import providerFromMiddleware from 'eth-json-rpc-middleware/providerFromMiddleware'
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import BlockTracker from 'eth-block-tracker'
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export default function createJsonRpcClient ({ rpcUrl, chainId }) {
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const fetchMiddleware = createFetchMiddleware({ rpcUrl })
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const blockProvider = providerFromMiddleware(fetchMiddleware)
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const blockTracker = new BlockTracker({ provider: blockProvider })
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const networkMiddleware = mergeMiddleware([
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createChainIdMiddleware(chainId),
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createBlockRefRewriteMiddleware({ blockTracker }),
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createBlockCacheMiddleware({ blockTracker }),
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createInflightMiddleware(),
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createBlockTrackerInspectorMiddleware({ blockTracker }),
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fetchMiddleware,
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])
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return { networkMiddleware, blockTracker }
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}
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function createChainIdMiddleware (chainId) {
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return (req, res, next, end) => {
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if (req.method === 'eth_chainId') {
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res.result = chainId
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return end()
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}
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return next()
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}
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}
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