Ethereum address test tool

0- Private ECDSA Key: (any random 256-bit number from 0x1 to 0xFFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFE BAAE DCE6 AF48 A03B BFD2 5E8C D036 4140)
more info: Secp256k1
Rand Reset

calculate public key

1- Public ECDSA Key: (ethereum public key must be 64byte (32byte x 32byte y coordinates)
(this is uncompressed ECDSA public key without 04 prefix)
keccak-256(public key)

2- Keccak-256 hash of 1: get last 20 bytes of this

3- last 20 bytes of 2: (this is ethereum address(without 0x prefix) but currently have not checksum)

starting checksum calculation
4- Keccak-256(tolowercase( value of 3 )): (this is checksum reference)
(compare first 40 hex digit)
(a=10,b=11,c=12,d=13,e=14,f=15)
how?:
if (n th digit of (value of 4) > 7) then:
–> n th digit of (value of 3) must be uppercase(ignore digit is number)
else
–> n th digit of (value of 3) must be lowercase(ignore digit is number)

5- ethereum address with checksum: 6- add 0x prefix to 5: (case sensitive final address)