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EIP-1895: Improvements #2153

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Jul 2, 2019
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EIP-1895: Improvements #2153

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6f442c5
EIP-1895: Better constants and address range description
chfast Jun 28, 2019
0b53ecb
EIP-1985: Fix a typo
chfast Jun 28, 2019
8eed2df
EIP-1985: Use "instructions" instead of "opcodes"
chfast Jun 28, 2019
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19 changes: 10 additions & 9 deletions EIPS/eip-1985.md
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Original file line number Diff line number Diff line change
Expand Up @@ -25,23 +25,24 @@ by eliminating unrealistic edge cases.
## Specification

If `block.number >= {FORK_BLOCK}`, the following value ranges are introduced.
They restrict the results (i.e. values pushed to the stack) of the opcodes listed below.
They restrict the results (i.e. values pushed to the stack) of the instructions listed below.

1. *gas*, *gas limit*, *block gas limit*
is a range between `0` and `9223372036854775807` (`2**63 - 1`).
It affects following the opcodes:
is a range between `0` and `0x7fffffffffffffff` (`2**63 - 1`, `9223372036854775807`).
It affects the following instructions:
- `GASLIMIT` (`0x45`),
- `GAS` (`0x5a`).

2. *block number*, *timestamp*
is a range between `0` and `9223372036854775807` (`2**63 - 1`).
It affects the following opcodes:
is a range between `0` and `0x7fffffffffffffff` (`2**63 - 1`, `9223372036854775807`).
It affects the following instructions:
- `TIMESTAMP` (`0x42`),
- `NUMBER` (`0x43`).

3. *account address*
is a range between `0` and `1461501637330902918203684832716283019655932542975` (`2**160 - 1`).
It affects the following opcodes:
is a range between `0` and `0xffffffffffffffffffffffffffffffffffffffff` (`2**160 - 1`, `1461501637330902918203684832716283019655932542975`)
i.e. the address occupies the 160 low bits of the 256-bit value and the remaining top 96 bits must be zeros.
It affects the following instructions:
- `ADDRESS` (`0x30`),
- `ORIGIN` (`0x32`),
- `CALLER` (`0x33`),
Expand All @@ -50,8 +51,8 @@ They restrict the results (i.e. values pushed to the stack) of the opcodes liste
- `CREATE2` (`0xf5`).

4. *buffer size*
is a range between `0` and `4294967295` (`2**32 - 1`).
It affects the following opcodes:
is a range between `0` and `0xffffffff` (`2**32 - 1`, `4294967295`).
It affects the following instructions:
- `CALLDATASIZE` (`0x36`),
- `CODESIZE` (`0x38`),
- `EXTCODESIZE` (`0x3b`),
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