Implement bounded 256 bit int

[obscuren]

https://github.com/jonasnick/eth-neg-value-tx is calling for fixed size integers. The first implementation of this package will use the x = x & 1 << 256 - 1 to limit all operations.

• Create a new package with bounded arithmetic
  • Add / Sub / Mul / Div / Mod
  • Set / SetString
  • Uint / Int
  • Cmp
• Replace big.Int through out the implementation
• Support new package in rlp.Read / Write

[ch3ck]

Hi @obscuren I'm interested in working on this feature. What else is required at the moment?

[stale]

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