====== EIP 1884: Repricing for trie-size-dependent opcodes  ======
[[dido:public:ra:xapend:xapend.b_stds:defact:ethereum:start| Return to Ethereum ERCs ]]

: **Note**: The following is an excerpt from the official Ethereum site. It is provided here as a convenience and is not authoritative. Refer to the original document as the authoritative reference.

<table>
<caption>Data sheet for Repricing for trie-size-dependent opcodes</caption>
| Title                      | Repricing for trie-size-dependent opcodes |
| EIP                        | 1884 |
| Requires                   | <WRAP>
  * [[dido:public:ra:xapend:xapend.b_stds:defact:ethereum:eip:150]]
  * [[dido:public:ra:xapend:xapend.b_stds:defact:ethereum:eip:1052]]
</WRAP>||
| Author                     | Martin Holst Swende (@holiman) |
| Status                     | Final |
| Created                    | 2019-03-28  |
| Description                | [[https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1884.md]] |
| Specification              | [[https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1884.md#Specification]] |
| Category                   | Core |
</table>

===== Simple Summary =====

This EIP proposes repricing certain opcodes, to obtain a good balance between gas expenditure and resource consumption.

===== Abstract =====

The growth of the Ethereum state has caused certain opcodes to be more resource-intensive at this point than they were previously. This EIP proposes to raise the gasCost for those opcodes.

===== Motivation =====

An imbalance between the price of an operation and the resource consumption (CPU time, memory, etc.) has several drawbacks:

  * It could be used for attacks, by filling blocks with underpriced operations which causes excessive block processing time.
  * Underpriced opcodes cause a skewed block gas limit, where sometimes blocks finish quickly but other blocks with similar gas use finish slowly.

If operations are well-balanced, we can maximise the block gaslimit and have a more stable processing time.

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