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Prevent redundant eip7702Auth inclusion in UserOps to avoid unnecessary type 4 tx overhead #446

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Prevent redundant eip7702Auth inclusion in UserOps to avoid unnecessary type 4 tx overhead #446

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6dad33d
(add): checker for the authorization before sending userOp
Aug 19, 2025
191b408
Create kip-redundant-7702-auth.md
0xkoiner Aug 21, 2025
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6 changes: 6 additions & 0 deletions .changeset/kip-redundant-7702-auth.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
---
"permissionless": patch
---

Skip adding `authorization` to `sendTransaction` when the account is already 7702-attached to the same address.
This prevents redundant Type-4 overhead in UserOps and reduces calldata/gas; no changes required for consumers.
18 changes: 17 additions & 1 deletion packages/permissionless/actions/smartAccount/sendTransaction.ts
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Expand Up @@ -3,7 +3,8 @@ import type {
Client,
Hash,
SendTransactionParameters,
Transport
Transport,
getCode
} from "viem"
import {
type SendUserOperationParameters,
Expand Down Expand Up @@ -95,6 +96,21 @@ export async function sendTransaction<

if (!to) throw new Error("Missing to address")

if ("authorization" in args && args.authorization) {
const bytecode = await getCode(client, { address: account.address })

if (bytecode) {
const bc = bytecode.toLowerCase()
// "0x" + "ef0100" + 40 hex (address)
if (bc.startsWith("0xef0100") && bc.length >= 48) {
const attachedAddress = "0x" + bc.slice(8, 48) // <-- exact 20 bytes
const target = (args.authorization as any).address?.toLowerCase?.()
if (target && attachedAddress === target) {
delete (args as any).authorization
}
}
}
}
userOpHash = await getAction(
client,
sendUserOperation,
Expand Down