viem
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JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.watchBlocks = void 0;
const block_js_1 = require("../../utils/formatters/block.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 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 = typeof poll_ !== 'undefined' ? poll_ : client.transport.type !== 'webSocket';
const includeTransactions = includeTransactions_ ?? false;
let prevBlock;
const pollBlocks = () => {
const observerId = (0, stringify_js_1.stringify)([
'watchBlocks',
client.uid,
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 unsubscribe = () => (active = false);
(async () => {
try {
const { unsubscribe: unsubscribe_ } = await client.transport.subscribe({
params: ['newHeads'],
onData(data) {
if (!active)
return;
const format = client.chain?.formatters?.block?.format || block_js_1.formatBlock;
const block = format(data.result);
onBlock(block, prevBlock);
prevBlock = block;
},
onError(error) {
onError?.(error);
},
});
unsubscribe = unsubscribe_;
if (!active)
unsubscribe();
}
catch (err) {
onError?.(err);
}
})();
return unsubscribe;
};
return enablePolling ? pollBlocks() : subscribeBlocks();
}
exports.watchBlocks = watchBlocks;
//# sourceMappingURL=watchBlocks.js.map