viem
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JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.watchBlocks = watchBlocks;
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 getBlock_js_1 = require("./getBlock.js");
function watchBlocks(client, { blockTag = 'latest', emitMissed = false, emitOnBegin = false, onBlock, onError, includeTransactions: includeTransactions_, 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;
})();
const includeTransactions = includeTransactions_ ?? false;
let prevBlock;
const pollBlocks = () => {
const observerId = (0, stringify_js_1.stringify)([
'watchBlocks',
client.uid,
blockTag,
emitMissed,
emitOnBegin,
includeTransactions,
pollingInterval,
]);
return (0, observe_js_1.observe)(observerId, { onBlock, onError }, (emit) => (0, poll_js_1.poll)(async () => {
try {
const block = await (0, getAction_js_1.getAction)(client, getBlock_js_1.getBlock, 'getBlock')({
blockTag,
includeTransactions,
});
if (block.number && prevBlock?.number) {
if (block.number === prevBlock.number)
return;
if (block.number - prevBlock.number > 1 && emitMissed) {
for (let i = prevBlock?.number + 1n; i < block.number; i++) {
const block = (await (0, getAction_js_1.getAction)(client, getBlock_js_1.getBlock, 'getBlock')({
blockNumber: i,
includeTransactions,
}));
emit.onBlock(block, prevBlock);
prevBlock = block;
}
}
}
if (!prevBlock?.number ||
(blockTag === 'pending' && !block?.number) ||
(block.number && block.number > prevBlock.number)) {
emit.onBlock(block, prevBlock);
prevBlock = block;
}
}
catch (err) {
emit.onError?.(err);
}
}, {
emitOnBegin,
interval: pollingInterval,
}));
};
const subscribeBlocks = () => {
let active = true;
let emitFetched = true;
let unsubscribe = () => (active = false);
(async () => {
try {
if (emitOnBegin) {
(0, getAction_js_1.getAction)(client, getBlock_js_1.getBlock, 'getBlock')({
blockTag,
includeTransactions,
}).then((block) => {
if (!active)
return;
if (!emitFetched)
return;
onBlock(block, undefined);
emitFetched = false;
});
}
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'],
async onData(data) {
if (!active)
return;
const block = (await (0, getAction_js_1.getAction)(client, getBlock_js_1.getBlock, 'getBlock')({
blockNumber: data.blockNumber,
includeTransactions,
}).catch(() => { }));
if (!active)
return;
onBlock(block, prevBlock);
emitFetched = false;
prevBlock = block;
},
onError(error) {
onError?.(error);
},
});
unsubscribe = unsubscribe_;
if (!active)
unsubscribe();
}
catch (err) {
onError?.(err);
}
})();
return () => unsubscribe();
};
return enablePolling ? pollBlocks() : subscribeBlocks();
}
//# sourceMappingURL=watchBlocks.js.map