bitcoinjsminimaldata
Following BIP62.3, this module validates that a script uses only minimal data pushes.
Example
var minimaldata = require('minimaldata')
// OP_PUSHDATA4, 1 byte
var script = new Buffer('4e0100000000', 'hex')
console.log(minimaldata(script))
// => false
script = new Buffer('0101', 'hex')
console.log(minimaldata(script))
// => true