89 lines
1.9 KiB
JavaScript
89 lines
1.9 KiB
JavaScript
const Block = require('../../models/block.js');
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const logger = require('../logger');
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const config = require('../../config');
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const MAX_BLOCKS = config.api.max_blocks; // ~ 12 hours
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let bestBlockHeight = 0;
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// This naive querying will be replaced by more advanced mongo
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function getBlocks(params, options, limit, cb) {
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// Do not return mongo ids
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const defaultOptions = { _id: 0 };
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// Copy over mongo options
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Object.assign(defaultOptions, options);
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// Simple sanitizing
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if (!Number.isInteger(limit)) {
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limit = 1;
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}
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if (limit > MAX_BLOCKS) {
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limit = MAX_BLOCKS;
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}
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if (limit < 1) {
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limit = 1;
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}
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// Query mongo
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Block.find(
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params,
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defaultOptions,
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(err, blocks) => {
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if (err) {
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logger.log('error',
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`getBlocks: ${err}`);
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return cb(err);
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}
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if (!blocks.length > 0) {
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return cb({ err: 'Block not found' });
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}
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return cb(null, blocks);
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})
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.sort({ height: -1 })
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.limit(limit);
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}
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// Retrieve a single block. For convenience mostly
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function getBlock(params, options, limit, cb) {
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getBlocks(params, options, limit, (err, blocks) => {
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if (err) {
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logger.log('error',
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`getBlock: ${err.err}`);
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return cb(err);
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}
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if (!blocks.length > 0) {
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return cb({ err: 'Block not found' });
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}
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return cb(null, blocks[0]);
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});
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}
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// Highest known height in mongo - Not Used
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function getBestHeight() {
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getBlock({}, {}, 1, (err, block) => {
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if (err) {
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logger.log('error',
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`getBestHeight: ${err.err}`);
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return;
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}
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bestBlockHeight = block.height;
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});
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}
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// 1e9 limit = ~2M years from now
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// Mostly for sync to set height
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function bestHeight(height) {
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if (Number.isInteger(height) &&
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height > 0 &&
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height < 1 * 1e9) {
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bestBlockHeight = height;
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return bestBlockHeight;
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}
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return bestBlockHeight;
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}
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module.exports = {
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getBlock,
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getBlocks,
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bestHeight,
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};
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