"Error: This method only supports 0x-prefixed hex strings but input was"

Users have recently reported receiving the error "Error: This method only supports 0x-prefixed hex strings but input was: "

Our developers are aware and working on investigating further.

Workarounds:
Some users mentioned this article was helpful https://metamask.zendesk.com/hc/en-us/articles/360016336611-Revert-Back-to-Earlier-Version-or-Add-Custom-Build-to-Chrome

If you have any additional information on what lead to this error and any other solutions, please help to share.

User Security:
NEVER share your secret seed phrase /recovery phrase! Not even with MetaMask!

27 Likes

Has this been fixed? been stuck with this error for hours trying to approve a token.

10 Likes

we have are patch to download ?

7 Likes

im still waiting on a reply or fix. my token value went from being worth 70 to now just 11 because of this.

8 Likes

This issue has been fixed in v 9.5.2. Please update your extension and this issue should be resolved. Please let us know if you continue to experience this error after updating.

10 Likes

Version 9.5.3 the same error. And I can’t remove this message in any way. “Cannot convert string to buffer. toBuffer only supports 0x-prefixed hex strings and this string was given”

7 Likes

Welcome to the Metamask Community, @mrxtraf Can you help to share more details on what were the steps that lead to this error message? Can you help to share a screenshot of the error message?

5 Likes


After try send ETH.
You can get rid of the error by uninstalling the extensions and reinstalling.

Full Text
Сообщение: Cannot convert string to buffer. toBuffer only supports 0x-prefixed hex strings and this string was given: 0xHi. I need to talk about your address 0x4cdxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx . Contact me to xxxxxxxxxx@gmail.com

Код: Error

Стек:
Error: Cannot convert string to buffer. toBuffer only supports 0x-prefixed hex strings and this string was given: 0xHi. I need to talk about your address 0x4cdxxxxxxxxxxxxxxxxxxxxxxxxxx . Contact me to xxxxxxxxxxx@gmail.com
at r.toBuffer (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:72:205598)
at T.renderData (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:152:768583)
at T.render (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:152:772907)
at Ya (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:75:70734)
at Ka (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:75:70529)
at jl (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:75:105704)
at bu (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:75:90053)
at pu (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:75:89978)
at iu (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:75:87326)
at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:75:45768
at r.unstable_runWithPriority (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:172:3472)
at Vo (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:75:45477)
at Yo (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:75:45713)
at Ko (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:75:45648)
at au (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:75:87618)
at Object.notify (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:93:24588)
at e.t.notifyNestedSubs (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:93:24155)
at e.t.handleChangeWrapper (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui-libs.js:93:24223)
at b (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:63254)
at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:57230
at dispatch (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:59495)
at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:152:1353815
at Object.dispatch (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:57221)
at Object.dispatch (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:77703)
at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:152:1359677
at s. (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:1:3953)
at u (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:90211)
at s.emit (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:90736)
at s.handleResponse (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:1:4155)
at f (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:59:21106)
at s.i.emit (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:59:24092)
at w (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:18447)
at _ (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:18262)
at s.y.push (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:19073)
at t.exports._write (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:113:216651)
at y (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:31429)
at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:34607
at t.exports.v.write (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:34634)
at t.exports.m (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:23642)
at f (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:59:21106)
at t.exports.i.emit (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:59:24092)
at w (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:18447)
at _ (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:18262)
at t.exports.y.push (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:137:19073)
at t.exports._onMessage (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:81:57176)
at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/ui.js:81:57026

4 Likes

I’m using MetaMask Version 9.6.1
Getting this error message, today 7/7/2021 for importing wallet via private key:

“Cannot convert string to buffer. toBuffer only supports 0x-prefixed hex strings and this string was given: 0x”

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