examples/run-blockchain/index.js
function (next) {
    async.eachSeries(testData.blocks, eachBlock, next)

    function eachBlock (raw, cb) {
      try {
        var block = new Block(
            Buffer.from(raw.rlp.slice(2), 'hex'))

        // forces the block into thinking they are homestead
        block.header.isHomestead = function () {
          return true
        }
        block.uncleHeaders.forEach(function (uncle) {
          uncle.isHomestead = function () { return true }
        })

        blockchain.putBlock(block, function (err) {
          cb(err)
        })
      } catch (err) {
        cb()
      }
    }
  }
function (next) {
    async.eachSeries(testData.blocks, eachBlock, next)

    function eachBlock (raw, cb) {
      try {
        var block = new Block(
            Buffer.from(raw.rlp.slice(2), 'hex'))

        // forces the block into thinking they are homestead
        block.header.isHomestead = function () {
          return true
        }
        block.uncleHeaders.forEach(function (uncle) {
          uncle.isHomestead = function () { return true }
        })

        blockchain.putBlock(block, function (err) {
          cb(err)
        })
      } catch (err) {
        cb()
      }
    }
  }
add some following blocks