Solana Safe Math

 use solana_safe_math::{SafeMath};
 
 fn process_init_escrow(
   accounts: &[AccountInfo],
   amount: u64,
   program_id: &Pubkey
 ) -> ProgramResult {
   let val = 10_u64;
  
   val.safe_add(amount)?;
   val.safe_sub(amount)?;
   val.safe_mul(amount)?;
   val.safe_div(amount)?;
   val.safe_pow(8_u32)?;
 }

支持 u128、u64、u32、u16 和 u8

lib.rs:

Anchor Safe Math

anchor_safe_math 是一组辅助数值运算函数集合，用于消除检查溢出、下溢和除以零错误时的冗余。

示例

use solana_safe_math::{SafeMath};
use solana_program::{entrypoint::ProgramResult};

fn process_init_escrow(
  accounts: &[AccountInfo],
  amount: u64,
  program_id: &Pubkey
) -> ProgramResult {
  let val = 10_u64;
 
  val.safe_add(amount)?;
  val.safe_sub(amount)?;
  val.safe_mul(amount)?;
  val.safe_div(amount)?;
  val.safe_pow(8_u32)?;
}