74 lines
1.6 KiB
JavaScript
74 lines
1.6 KiB
JavaScript
const Block = require('../../models/block.js');
|
|
const logger = require('../logger');
|
|
const config = require('../../config');
|
|
|
|
const MAX_BLOCKS = config.api.max_blocks; // ~ 12 hours
|
|
|
|
function getBlocks(params, options, limit, cb) {
|
|
// Do not return mongo ids
|
|
const defaultOptions = { _id: 0 };
|
|
// Copy over mongo options
|
|
Object.assign(defaultOptions, options);
|
|
// Simple sanitizing
|
|
if (!Number.isInteger(limit)) {
|
|
limit = 1;
|
|
}
|
|
|
|
if (limit > MAX_BLOCKS) {
|
|
limit = MAX_BLOCKS;
|
|
}
|
|
|
|
if (limit < 1) {
|
|
limit = 1;
|
|
}
|
|
|
|
// Query mongo
|
|
Block.find(
|
|
params,
|
|
defaultOptions,
|
|
(err, blocks) => {
|
|
if (err) {
|
|
logger.log('error',
|
|
`getBlocks: ${err}`);
|
|
return cb(err);
|
|
}
|
|
if (!blocks.length > 0) {
|
|
return cb({ err: 'Block not found' });
|
|
}
|
|
return cb(null, blocks);
|
|
})
|
|
.sort({ height: -1 })
|
|
.limit(limit);
|
|
}
|
|
// Retrieve a single block. For convenience mostly
|
|
function getBlock(params, options, limit, cb) {
|
|
getBlocks(params, options, limit, (err, blocks) => {
|
|
if (err) {
|
|
logger.log('error',
|
|
`getBlock: ${err.err}`);
|
|
return cb(err);
|
|
}
|
|
if (!blocks.length > 0) {
|
|
return cb({ err: 'Block not found' });
|
|
}
|
|
return cb(null, blocks[0]);
|
|
});
|
|
}
|
|
// Highest known height
|
|
function getBestHeight(cb) {
|
|
getBlock({}, {}, 1, (err, block) => {
|
|
if (err) {
|
|
logger.log('error',
|
|
`getBlock: ${err.err}`);
|
|
return cb(err, null);
|
|
}
|
|
return cb(null, block.height);
|
|
});
|
|
}
|
|
|
|
module.exports = {
|
|
getBlock,
|
|
getBlocks,
|
|
getBestHeight,
|
|
};
|