The brain regulations must include hash values and require replacement or cropping modifications to the hash values. For example, it can be set as: BrainPassword1+X(SHA256(BrainPassword2))+Y(SHA256(SHA256(BrainPassword3))+… Among them, X() and Y() are modifications to the hash value.
Compressed public key: Prefix (if y is even, prefix is 02; if y is odd, prefix is 03)+X coordinate (32 bytes); Uncompressed public key: Prefix (04)+X coordinate (32 bytes)+Y coordinate (32 bytes).
The final Bech32Check encoding address=Prefix+Separator+Data(Version+Bech32 Address)+Checksum. The encode function calculates and concatenates prefixe, separator, Bech32 addresses with version numbers, and checksums. The checksum is a six character code calculated using the prefix and the Bech32 address with a version number, concatenated directly to the end.
1. Actually, it is to sign the double hash value SHA256 (hexTobytes (SHA256 (hexTobytes) to be signed). 2. For security reasons, random numbers are introduced during the signature process. When signing the same information, the signature value changes every time, but each signature value is valid.
Almost all 64 bit hex strings can be used as private keys. The range of values for legitimate private keys is (0,FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141)
public key: X coordinate (32 bytes)+Y coordinate (32 bytes).
公钥：X坐标(32字节)+Y坐标(32字节)。
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【CheckSum Address - 带校验和的地址】
Ethereum implicitly adds checksums by introducing uppercase letters to prevent accidentally entering incorrect addresses. The rule is: (1) First, treat the address as a string (excluding the starting '0x'), and calculate the Keccak value; (2) If the value of the i-th bit of the Keccak value is ≥ 8, then the i-th bit of the address is changed to uppercase letters.