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Update EIP-7702: Change MAGIC from 0x05 to 0x1a #8835

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Update EIP-7702: Change MAGIC from 0x05 to 0x1a #8835

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Update EIP-7702: Change `MAGIC` from `0x05` to `0x1a`
etan-status Aug 29, 2024
adcf79f
Merge branch 'master' into sc-magic
etan-status Jan 6, 2025
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8 changes: 4 additions & 4 deletions EIPS/eip-7702.md
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Original file line number Diff line number Diff line change
Expand Up @@ -30,7 +30,7 @@ There is a lot of interest in adding short-term functionality improvements to EO
| Parameter | Value |
| ------------------------ | ------- |
| `SET_CODE_TX_TYPE` | `0x04` |
| `MAGIC` | `0x05` |
| `MAGIC` | `0x1a` |
| `PER_AUTH_BASE_COST` | `12500` |
| `PER_EMPTY_ACCOUNT_COST` | `25000` |

Expand Down Expand Up @@ -74,7 +74,7 @@ At the start of executing the transaction, after incrementing the sender's nonce
5. Verify the code of `authority` is either empty or already delegated.
6. Verify the nonce of `authority` is equal to `nonce`. In case `authority` does not exist in the trie, verify that `nonce` is equal to `0`.
7. Add `PER_EMPTY_ACCOUNT_COST - PER_AUTH_BASE_COST` gas to the global refund counter if `authority` exists in the trie.
8. Set the code of `authority` to be `0xef0100 || address`. This is a delegation designation.
8. Set the code of `authority` to be `0xef0100 || address`. This is a delegation designation.
* As a special case, if `address` is `0x0000000000000000000000000000000000000000` do not write the designation. Clear the account's code and reset the account's code hash to the empty hash `0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470`.
9. Increase the nonce of `authority` by one.

Expand Down Expand Up @@ -115,7 +115,7 @@ Additionally, if a transaction's `destination` has a delegation designation, add
The `PER_AUTH_BASE_COST` is the cost to process the authorization tuple and set the delegation destination. We are able to compute a fair cost for this operation by reviewing its impact on the system:

* ferry 101 bytes of calldata = `101 * non-zero cost (16) = 1616`
* recovering the `authority` address = `3000`
* recovering the `authority` address = `3000`
* reading the nonce and code of `authority` = `2600`
* storing values in already warm account = `200`
* cost to deploy code = `200 * 23 = 4600`
Expand Down Expand Up @@ -198,7 +198,7 @@ Specifically:

A general design goal of state transition changes is to minimize the number of special cases an EIP has. In early iterations, this EIP resisted a special case for clearing an account's delegation designation.

For most intents and purposes, an account delegated to `0x0` is indistinguishable from a true EOA. However, one particular unfortunate case is unavoidable. Even if a user has a zeroed out delegation designation, most operations that interact with that account will encounter an additional `COLD_ACCOUNT_READ_COST` upon the first touch.
For most intents and purposes, an account delegated to `0x0` is indistinguishable from a true EOA. However, one particular unfortunate case is unavoidable. Even if a user has a zeroed out delegation designation, most operations that interact with that account will encounter an additional `COLD_ACCOUNT_READ_COST` upon the first touch.

This is not ideal and may be a significant enough concern to impact the overall adoption of the EIP. For these reasons, we have opted to include a mechanism which allow users to restore their EOA to its original pureness.

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