Block Chain 區塊鏈

This is a project that I try to build a blockchain by myself.

Using go lang to build a blockchain.

How to download

git clone https://github.com/weiawesome/block-chain_go.git

How to start (Miners)

(Ensure the computer have been installed go) (Ensure the mongodb is working)

go run main.go

• Success to build a node in 127.0.0.1:8080

How to edit the file

Edit the main.go

//This mean the miner's node address
NodeAddr := "127.0.0.1:8080"

//This mean can connect to other node
NodeAddresses := []string{}

//This mean the mongodb's address
DbAddress:="localhost:27017"

//This mean the miners(goroutines) to mine. 
Miners := 1

Easy to start a mongodb by docker

Make a mongodb container and port-forward to localhost

docker run --name mongodb -p 27017:27017 -d mongo

How to connect with exist node

Edit the main.go

//This mean the miner's node address(choose another port)
NodeAddr := "127.0.0.1:8081"

//This mean can connect to other node(choose exist node)
NodeAddresses := []string{"127.0.0.1:8080"}

//This mean the mongodb's address(choose db in other port)
DbAddress:="localhost:27018"

• Success to connect with 127.0.0.1:8080
• Success to build and update the database
• Success to build a node in 127.0.0.1:8081 and connect with 127.0.0.1:8080

How to get block

(Ensure the Miners is working)

Get block by block_hash

go run api_block_get_by_block_hash.go

• Success to get the block with specific block hash

Edit Get block by block_hash

Edit the api_block_get_by_block_hash.go

//This is the query block_hash
var BlockHash string
BlockHash = "BlockHash"

//This is the connect node address
ConnectAddr:="127.0.0.1:8080"

Get block by block_height

go run api_block_get_by_block_height.go

• Success to get the block which block height equal to 0(Genesis block)

Edit Get block by block_height

Edit the api_block_get_by_block_height.go

//This is the query block_height
var BlockHeight int64
BlockHeight = 0

//This is the connect node address
ConnectAddr := "127.0.0.1:8080"

Get the last block

go run api_block_get_last.go

• Success to get latest block

Edit Get the last block

Edit the api_block_get_last.go

//This is the connect node address
ConnectAddr := "127.0.0.1:8080"

How to submit transaction

(Ensure the Miners is working)

Submit the transaction

go run api_transaction_submit.go

• Success to submit a transaction into blockchain
• Success to show the transaction's detail information

Edit Submit the transaction

Edit the api_transaction_submit.go

//This is UTXOHash to prove the asset
UTXOHash = "UTXOHash"

//This is to use with UTXOHash to prove the asset
Index = 0

//This is the address the transaction transfer
Address = "Address"

//This is the amount the transaction transfer
Amount = 0

//This is the fee to miner in the transaction
Fee = 0

//This is public key for sender
PublicKey = "PublicKey"

//This is private key for sender
PrivateKey = "PrivateKey"

//This is the connect node address
ConnectAddr := "127.0.0.1:8080"

Submit the Free transaction

# submit a transaction with specific address
go run api_transaction_submit_free.go
# submit a transaction with generating an address
go run api_transaction_submit_free_random_addr.go 

• Success to submit a transaction into blockchain
• Success to gain the free asset

Edit Submit the Free transaction

Edit the api_transaction_submit_free.go

//This is the amount give to the address 
var Amount float64
Amount=0

//This is the address to be given
var Addr string
Addr = "Address"

//This is the connect node address
ConnectAddr := "127.0.0.1:8080"

Edit the api_transaction_submit_free_random_addr.go

//This is the amount give to the address 
var Amount float64
Amount=0

//This is the connect node address
ConnectAddr := "127.0.0.1:8080"