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Welcome to Blockchain Demo!

Lab 2: Block

Let’s examine blocks on the blockchain

Step 1: TYPE THE FOLLOWING INTO THE DATA FIELD, VERBATIM:

How now brown cow

Step 2: Click the “mine” button

The Fields should read as follows:

Nonce: 65242
Hash: 000045601710ef0bf05b42b599d704476ad939403de3a4c36a2f3b9c4e54af77

(notice the 4 leading 0’s)

Take note of Block #2: Look at the “Previous Field,” the hash of block 1 is now embedded into block 2

Step 3: TYPE THE FOLLOWING INTO THE DATA FIELD OF BLOCK #2, VERBATIM AND CLICK “MINE”

How now, brown cow


The Fields should read as follows:

Nonce: 20772
Hash: 0000a965d394b15605c1997c8167e8698257591493f8505130fe8b7a8377ea22
(notice the 4 leading 0’s and the “prev” on block 3)

Step 4: TYPE THE FOLLOWING INTO THE DATA FIELD OF BLOCK #3, VERBATIM AND CLICK “MINE”

How now brown cow
How now, brown cow

The Fields should read as follows:

Nonce: 12673
Hash: 0000e83dfe134fddca2b748d11189c980118a03b6b377bee61232744b9e5068b (notice the 4 leading 0’s)

Now that we have a great idea of the make-up of blocks on the blockchain let’s return back to EDx and continue the course.


Please return back to EdX