index.js
function (cb3) {
        blockChain.getDetails(uncle.hash(), function (err, blockInfo) {
          // TODO: remove uncles from BC
          if (blockInfo && blockInfo.isUncle) {
            cb3(err || 'uncle already included')
          } else {
            cb3()
          }
        })
      }
function (cb3) {
        blockChain.getDetails(uncle.hash(), function (err, blockInfo) {
          // TODO: remove uncles from BC
          if (blockInfo && blockInfo.isUncle) {
            cb3(err || 'uncle already included')
          } else {
            cb3()
          }
        })
      }
function ( cb3 ) { blockChain . getDetails ( uncle . hash ( ) , function ( err , blockInfo ) { // TODO: remove uncles from BC if ( blockInfo && blockInfo . isUncle ) { cb3 ( err || 'uncle already included' ) } else { cb3 ( ) } } ) }
check to make sure the uncle is not already in the blockchain
check to make sure the uncle is not already in the blockchain