viem
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JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.watchBlockNumber = watchBlockNumber;
const fromHex_js_1 = require("../../utils/encoding/fromHex.js");
const getAction_js_1 = require("../../utils/getAction.js");
const observe_js_1 = require("../../utils/observe.js");
const poll_js_1 = require("../../utils/poll.js");
const stringify_js_1 = require("../../utils/stringify.js");
const getBlockNumber_js_1 = require("./getBlockNumber.js");
function watchBlockNumber(client, { emitOnBegin = false, emitMissed = false, onBlockNumber, onError, poll: poll_, pollingInterval = client.pollingInterval, }) {
const enablePolling = (() => {
if (typeof poll_ !== 'undefined')
return poll_;
if (client.transport.type === 'webSocket')
return false;
if (client.transport.type === 'fallback' &&
client.transport.transports[0].config.type === 'webSocket')
return false;
return true;
})();
let prevBlockNumber;
const pollBlockNumber = () => {
const observerId = (0, stringify_js_1.stringify)([
'watchBlockNumber',
client.uid,
emitOnBegin,
emitMissed,
pollingInterval,
]);
return (0, observe_js_1.observe)(observerId, { onBlockNumber, onError }, (emit) => (0, poll_js_1.poll)(async () => {
try {
const blockNumber = await (0, getAction_js_1.getAction)(client, getBlockNumber_js_1.getBlockNumber, 'getBlockNumber')({ cacheTime: 0 });
if (prevBlockNumber) {
if (blockNumber === prevBlockNumber)
return;
if (blockNumber - prevBlockNumber > 1 && emitMissed) {
for (let i = prevBlockNumber + 1n; i < blockNumber; i++) {
emit.onBlockNumber(i, prevBlockNumber);
prevBlockNumber = i;
}
}
}
if (!prevBlockNumber || blockNumber > prevBlockNumber) {
emit.onBlockNumber(blockNumber, prevBlockNumber);
prevBlockNumber = blockNumber;
}
}
catch (err) {
emit.onError?.(err);
}
}, {
emitOnBegin,
interval: pollingInterval,
}));
};
const subscribeBlockNumber = () => {
const observerId = (0, stringify_js_1.stringify)([
'watchBlockNumber',
client.uid,
emitOnBegin,
emitMissed,
]);
return (0, observe_js_1.observe)(observerId, { onBlockNumber, onError }, (emit) => {
let active = true;
let unsubscribe = () => (active = false);
(async () => {
try {
const transport = (() => {
if (client.transport.type === 'fallback') {
const transport = client.transport.transports.find((transport) => transport.config.type === 'webSocket');
if (!transport)
return client.transport;
return transport.value;
}
return client.transport;
})();
const { unsubscribe: unsubscribe_ } = await transport.subscribe({
params: ['newHeads'],
onData(data) {
if (!active)
return;
const blockNumber = (0, fromHex_js_1.hexToBigInt)(data.result?.number);
emit.onBlockNumber(blockNumber, prevBlockNumber);
prevBlockNumber = blockNumber;
},
onError(error) {
emit.onError?.(error);
},
});
unsubscribe = unsubscribe_;
if (!active)
unsubscribe();
}
catch (err) {
onError?.(err);
}
})();
return () => unsubscribe();
});
};
return enablePolling ? pollBlockNumber() : subscribeBlockNumber();
}
//# sourceMappingURL=watchBlockNumber.js.map