class 6.txt

Reference Links:
-----------------

DAO - https://makerdao.com/en/

DAPPS - https://app.uniswap.org/#/swap

IPFS  - https://ipfs.tech/



Dapp --> User intefacing applications deplyed on eth blockchain

DAO --> Decentralized autonomous organizations ---> regulatory , Voting use cases,

Company board meeting conducted on DAo to chose wherether to go for selling out shares as part of ressling option

SVB:
----

 DAO: {member1, mebmer2, member 3 ...... member n}

 input votes from users ----> smart contract

 smarct contract --> will decide upon the final decision

 user identity ---> ethereum account ---> vote casting 



anything on ETH blockchain cn be refered thru ethereum address

smart contract address ---> 0909879jhbjhjhbjhgh9809809809  

query cust balance of accnt 1 --> 8979870987jhkjhjj

contrat address ----> 0909879jhbjhjhbjhgh9809809809  

                     ----> accnt 1 ---> 100 eth

Nonce is ethereum is a random number generated for each and evry txn in order make it truly random and eleminate the duble spending problem

account1: 12345

 txn1 ---> usra to usrb ---> 10 eth , nonce ---> 7687687 (uuid)
 txn2 ---> usra to usrc --->  5 eth,  nonce ---> 1266779 (uuid)



10 txn ----> block 7 + block 8 9 10 11 12 13 14 

10 txn ----> uncle block7 --- no yet confimred to the chain ---> not part of chain and txns

10 txn ---> block 15/16 ----> main ledger


miner 5 ---> block 7 (1,2,3,4,5) ---> 7 next block confirmations for majority of miners

miner 8 ---> block 7 (1,2,3,)

other miners -----> majority of miners chose block 7 from miner 5 ---> more txmn

uncle block ----> miner 8 ----> 0.00625 eth

validations:
-------------
1. check the ledger balance
2. validate the adress with public key
3. validate the recepient adress with public key
4. validate the status of recepient address

User A transferring 10 ETH to User B ----> Trxn (digitial sign verifications)

User A deploying a smart contract in a network ---> message


Swarm protocol  ---> Ledger sharing ---> storage

Whisper protocl ---> Ledger replicating ---> TCP communication


Use cases:
------------


B2B ---> enterprise level ---> private/enterprise blockchain ---> hyperledger

  no txn fee, identity are to be revelaed


B2C ---> NFT market paces, DEX, DAO ---> ETH, polygon 
  
  txn fee exists, identiers are abstracted


Gorlei

ropsten

rinkbey 

sepolia ---> pos testnet


Ethereum has unlimited supply: 

burning fee ---> where in as part of block creation few ethers will get burn/wiped out


genesis block ----> 200M eth


block 1 ----> 10000 eth, burn/wipe ---> 0.1% of eth ---> 100

block 100 ----> 10M eth  (200 + 10 = 210M)          ---> 1M

(200 + 10 - 1) == 209M

Burn ---> Miner fee (120 eth, 1 eth)



100 nodes ----> block 100 ---> 51 confirmations 

 200 ---> 102-103

block ----> longest chain -> suffixded with 7 other valid blocks




https://github.com/trufflesuite/ganache-ui/releases 

select ganache-2.7.0-linux-x86_64.AppImage

open the folder and click on open terminal

sudo chmod 777 -R ganache-2.7.0-linux-x86_64.AppImage

./ganache-2.7.0-linux-x86_64.AppImage



step1 --- launch ganache node

setp2 --- launch remix ide

step3 --- choose any smarct contract from contract folder in remix

step4 --- compile the contract

step5 --- deploy the contrct to 'dev - ganache'




User1 ----> token.sol ----> deployment


 pass on my accoutn address ---> a123de

 deploying contract         ---> b567fg

(a123de ---> b567fg)




(g123hg ----> b567fg)

if anyone other than me tries to redeploy the contract---> it wil fail sending message that "caller is not owner"


can ther be more owenr per contract ?




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