fix: Sponsored transaction by normalising calldata handling

[pedronfigueiredo]

Description

• Added a shared #normalizeCallData helper in Delegation7702PublishHook so we always feed canonical 0x calldata into both the caveat builder and execution encoder, preventing stray zero bytes from drifting into caveat terms.
• Updated exactExecutionBuilder to reuse encodeSingleExecution so the stored caveat terms are guaranteed to match the execution payload, and relaxed validation so empty calldata is treated as 0x instead of 0x0.

Changelog

CHANGELOG entry:

Related issues

Fixes:

Manual testing steps

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Screenshots/Recordings

Before

After

Pre-merge author checklist

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• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
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Note

Normalizes calldata and keeps caveat terms byte-identical to execution, while sending sponsored transactions through the delegation publish hook.

• EIP-7702 Delegation flow:
  • Add #normalizeCallData to canonicalize txParams.data (lowercase, 0x-prefixed, even-length) and use it in #buildExecutions and #buildCaveats.
  • Route when to use delegation: include transactionMeta.isGasFeeSponsored in the non-smart/non-send-bundle condition in publishHook.
• Caveats/encoding:
  • exactExecutionBuilder: reuse encodeSingleExecution so terms match the execution payload; relax data validation to accept empty calldata as 0x (not 0x0).

^{Written by Cursor Bugbot for commit 1403824. This will update automatically on new commits. Configure here.}

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[metamaskbot]

✨ Files requiring CODEOWNER review ✨

✅ @MetaMask/confirmations (1 files, +5 -1)

• 📁 app/
  • 📁 scripts/
    • 📁 controller-init/
      • 📁 confirmations/
        • 📄 transaction-controller-init.ts +5 -1

[metamaskbot]

📊 Page Load Benchmark Results

Current Commit: 1403824 | Date: 10/15/2025

📄 Localhost MetaMask Test Dapp

Samples: 100

Summary

• pageLoadTime-> current mean value: 1.06s (±73ms) 🟡 | historical mean value: 1.05s ⬆️ (historical data)
• domContentLoaded-> current mean value: 749ms (±86ms) 🟢 | historical mean value: 739ms ⬆️ (historical data)
• firstContentfulPaint-> current mean value: 82ms (±44ms) 🟢 | historical mean value: 78ms ⬆️ (historical data)

📈 Detailed Results

Metric	Mean	Std Dev	Min	Max	P95	P99
pageLoadTime	1.06s	73ms	1.01s	1.36s	1.28s	1.36s
domContentLoaded	749ms	86ms	701ms	1.31s	957ms	1.31s
firstPaint	82ms	44ms	60ms	512ms	88ms	512ms
firstContentfulPaint	82ms	44ms	60ms	512ms	88ms	512ms
largestContentfulPaint	0ms	0ms	0ms	0ms	0ms	0ms

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Results generated automatically by MetaMask CI

[metamaskbot]

Builds ready [1403824]

• builds: chrome, firefox
• builds (beta): chrome, firefox
• builds (flask): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• bundle size: Bundle Size Stats
• user-actions-benchmark: User Actions Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7, 8
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
  • content-script: 0
  • offscreen: 0

UI Startup Metrics (1212 ± 72 ms)

Platform	BuildType	Page	Metric	Mean (ms)	Min (ms)	Max (ms)	Std Dev (ms)	P 75 (ms)	P 95 (ms)
Chrome	Browserify	Home	uiStartup	1212	1091	1562	72	1258	1317
			load	1042	949	1296	59	1080	1133
			domContentLoaded	1036	946	1288	58	1076	1127
			domInteractive	17	13	121	12	16	35
			firstPaint	726	128	1292	413	1065	1122
			backgroundConnect	247	233	276	6	250	258
			firstReactRender	25	18	50	6	25	42
			getState	16	5	77	10	18	38
			initialActions	8	1	70	12	7	38
			loadScripts	794	708	1036	57	830	882
			setupStore	9	6	23	3	10	17
	Webpack	Home	uiStartup	833	710	1121	69	848	978
			load	627	575	957	67	635	765
			domContentLoaded	619	571	947	66	629	758
			domInteractive	15	11	50	7	14	35
			firstPaint	196	54	950	196	190	598
			backgroundConnect	21	11	42	7	24	34
			firstReactRender	27	17	65	9	32	43
			getState	9	3	24	4	11	19
			initialActions	3	0	15	2	4	6
			loadScripts	617	569	936	63	627	747
			setupStore	10	4	21	3	12	14
Firefox	Browserify	Home	uiStartup	1445	1257	1973	138	1490	1800
			load	1210	1069	1422	83	1280	1383
			domContentLoaded	1209	1069	1421	83	1279	1383
			domInteractive	101	34	285	56	104	245
			firstPaint	NaN	NaN	NaN	NaN	NaN	NaN
			backgroundConnect	35	21	131	16	39	60
			firstReactRender	30	25	63	5	31	39
			getState	8	5	33	4	8	17
			initialActions	5	2	123	12	3	13
			loadScripts	1187	1050	1369	81	1262	1319
			setupStore	17	6	208	31	11	55
	Webpack	Home	uiStartup	1554	1353	1984	123	1577	1824
			load	1328	1189	1631	92	1367	1530
			domContentLoaded	1327	1188	1631	92	1366	1530
			domInteractive	97	31	379	64	95	322
			firstPaint	NaN	NaN	NaN	NaN	NaN	NaN
			backgroundConnect	36	21	162	18	40	66
			firstReactRender	33	26	80	9	33	41
			getState	9	5	111	11	9	13
			initialActions	7	1	184	24	3	15
			loadScripts	1303	1169	1605	90	1338	1504
			setupStore	12	5	71	12	10	35

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 292 Bytes (0.01%)
• ui: 0 Bytes (0%)
• common: 10 Bytes (0%)