# Latest **URL:** https://community.blockcerts.org/latest.md?page=3 [Latest](https://community.blockcerts.org/latest.md) · [Categories](https://community.blockcerts.org/categories.md) **Page:** 4 --- ## [Status on BlockCerts usability](https://community.blockcerts.org/t/status-on-blockcerts-usability/3279)
**Author:** [@bhavyasharma](https://community.blockcerts.org/u/bhavyasharma)\ **Replies:** 1\ **Last updated:** [September 12, 2022, 11:48am UTC](https://community.blockcerts.org/t/status-on-blockcerts-usability/3279 "2022-09-12T11:48:21Z")
Hi, So I am a student interested in start up and came across this tool which I thought would be a perfect fit. It essentially involves students being able to build their shareable e-portfolio for college applications an… --- ## [How do I add the name to my certificate?](https://community.blockcerts.org/t/how-do-i-add-the-name-to-my-certificate/3273)
**Author:** [@jhdezctza](https://community.blockcerts.org/u/jhdezctza)\ **Replies:** 1\ **Last updated:** [August 25, 2022, 10:28am UTC](https://community.blockcerts.org/t/how-do-i-add-the-name-to-my-certificate/3273 "2022-08-25T10:28:01Z")
How did you add the name when instantiating my certificate with version V3? thanks --- ## [Error with cert-verifier](https://community.blockcerts.org/t/error-with-cert-verifier/3249)
**Author:** [@Tomi](https://community.blockcerts.org/u/Tomi)\ **Replies:** 2\ **Last updated:** [July 13, 2022, 11:42pm UTC](https://community.blockcerts.org/t/error-with-cert-verifier/3249 "2022-07-13T23:42:50Z")
I executed cert-issuer with unsighned\_certificate and got a blockchain\_certificate, so I tried cert-verifier to verify my blockchain\_certificate, but I got this error cert\_core.UnknownBlockcertVersionException Anyon… --- ## [Wallet Verification Ethereum Testnet Error](https://community.blockcerts.org/t/wallet-verification-ethereum-testnet-error/3255)
**Author:** [@mary.tellez](https://community.blockcerts.org/u/mary.tellez)\ **Replies:** 4\ **Last updated:** [July 13, 2022, 8:41pm UTC](https://community.blockcerts.org/t/wallet-verification-ethereum-testnet-error/3255 "2022-07-13T20:41:56Z")
Hello, when I create my signed certificate with the cert-issuer tool and import it into my wallet, after clicking on the verify option, it returns this: What does this means. Please, help. --- ## [Wallet certificates](https://community.blockcerts.org/t/wallet-certificates/3257)
**Author:** [@mary.tellez](https://community.blockcerts.org/u/mary.tellez)\ **Replies:** 2\ **Last updated:** [July 13, 2022, 5:01pm UTC](https://community.blockcerts.org/t/wallet-certificates/3257 "2022-07-13T17:01:32Z")
Hello, I kept in my wallet a certificate with a public id that is not mine, how is this possible, is there a way to prevent this. Greetings --- ## [Error installing Cert-Issuer coincurve](https://community.blockcerts.org/t/error-installing-cert-issuer-coincurve/3254)
**Author:** [@mary.tellez](https://community.blockcerts.org/u/mary.tellez)\ **Replies:** 0\ **Last updated:** [July 12, 2022, 2:41pm UTC](https://community.blockcerts.org/t/error-installing-cert-issuer-coincurve/3254 "2022-07-12T14:41:09Z")
Hi, When I am trying to install cert-issuer I have tried running the below command: python setup.py experimental --blockchain=ethereum It is showing the error: Running setup.py install coincurve did not running succe… --- ## [Cert-Tools Help](https://community.blockcerts.org/t/cert-tools-help/1349)
**Author:** [@AlhaddadM](https://community.blockcerts.org/u/AlhaddadM)\ **Replies:** 8\ **Last updated:** [July 12, 2022, 6:51pm UTC](https://community.blockcerts.org/t/cert-tools-help/1349 "2022-07-12T18:51:13Z")
To create a batch of certificate… i need roster … it include name public key and identity… does that mean … to create a certificate for student i need to have his public key ? --- ## [Error: Issue the certificates on the blockchain](https://community.blockcerts.org/t/error-issue-the-certificates-on-the-blockchain/2378)
**Author:** [@dekts](https://community.blockcerts.org/u/dekts)\ **Replies:** 1\ **Last updated:** [July 11, 2022, 1:44pm UTC](https://community.blockcerts.org/t/error-issue-the-certificates-on-the-blockchain/2378 "2022-07-11T13:44:45Z")
Issue the certificates on the blockchain bash-4.3# cert-issuer -c /etc/cert-issuer/conf.ini WARNING - Your app is configured to skip the wifi check when the USB is plugged in. Read the documentation to ensure this is w… --- ## [Error with cert issuer - ethereum](https://community.blockcerts.org/t/error-with-cert-issuer-ethereum/1098)
**Author:** [@venky](https://community.blockcerts.org/u/venky)\ **Replies:** 2\ **Last updated:** [November 14, 2018, 5:50pm UTC](https://community.blockcerts.org/t/error-with-cert-issuer-ethereum/1098 "2018-11-14T17:50:46Z")
I got below error while running the cert issuer with ethereum ropsten. Any help please? (venv) venky:~/workspace (master) $ sudo cert-issuer -c conf.ini WARNING - Your app is configured to skip the wifi check when the … --- ## [Ethereum announced the testnet Ropsten would be closed in Q4 2022](https://community.blockcerts.org/t/ethereum-announced-the-testnet-ropsten-would-be-closed-in-q4-2022/3227)
**Author:** [@koshilife](https://community.blockcerts.org/u/koshilife)\ **Replies:** 3\ **Last updated:** [July 5, 2022, 6:47pm UTC](https://community.blockcerts.org/t/ethereum-announced-the-testnet-ropsten-would-be-closed-in-q4-2022/3227 "2022-07-05T18:47:59Z")
Hi community, According to this Ethereum official announcement, the Ropsten will be closed in Q4 2022. The following is the light quote. Ropsten: Q4 2022 The Ropsten testnet, which ran through The Merge on June 8, 20… --- ## [Is blockcerts.org related with Blockcerts.jp?](https://community.blockcerts.org/t/is-blockcerts-org-related-with-blockcerts-jp/3217)
**Author:** [@sleepingdroid](https://community.blockcerts.org/u/sleepingdroid)\ **Replies:** 1\ **Last updated:** [June 27, 2022, 7:21pm UTC](https://community.blockcerts.org/t/is-blockcerts-org-related-with-blockcerts-jp/3217 "2022-06-27T19:21:10Z")
I have link from Blockcerts.jp how can i use with blockcerts.org is it same website? --- ## [(V3) Verifier: I got an error "Buffer is not defined"](https://community.blockcerts.org/t/v3-verifier-i-got-an-error-buffer-is-not-defined/3226)
**Author:** [@koshilife](https://community.blockcerts.org/u/koshilife)\ **Replies:** 1\ **Last updated:** [June 21, 2022, 11:31am UTC](https://community.blockcerts.org/t/v3-verifier-i-got-an-error-buffer-is-not-defined/3226 "2022-06-21T11:31:40Z")
Hi community, I made the following VC as Blockcerts V3 schema using cert-issuer==3.0.1. I used did:web for issuer’s did and made a transaction on Ethereum Ropsten. After then, I tried to verify the generated VC on m… --- ## [How to convert my ETH wallet address into a valid DID format](https://community.blockcerts.org/t/how-to-convert-my-eth-wallet-address-into-a-valid-did-format/3219)
**Author:** [@koshilife](https://community.blockcerts.org/u/koshilife)\ **Replies:** 2\ **Last updated:** [June 20, 2022, 4:32pm UTC](https://community.blockcerts.org/t/how-to-convert-my-eth-wallet-address-into-a-valid-did-format/3219 "2022-06-20T16:32:17Z")
Hi, community! I’m learning Blockcerts V3. I created the following blockchain certificate by cert-issuer==3.0.1 and chose Ethereum Ropsten. https://gist.githubusercontent.com/koshilife/88601d21fedc81d9f6daec92b6017648/… --- ## [Error: with cert\_issuer -c conf.ini(AttributeError: ‘CertificateBatchHandler’ object has no attribute 'certificates\_to\_issue’)](https://community.blockcerts.org/t/error-with-cert-issuer-c-conf-ini-attributeerror-certificatebatchhandler-object-has-no-attribute-certificates-to-issue/3209)
**Author:** [@Tomi](https://community.blockcerts.org/u/Tomi)\ **Replies:** 2\ **Last updated:** [June 15, 2022, 11:24pm UTC](https://community.blockcerts.org/t/error-with-cert-issuer-c-conf-ini-attributeerror-certificatebatchhandler-object-has-no-attribute-certificates-to-issue/3209 "2022-06-15T23:24:21Z")
I got error when I try to issue a certificate AttributeError: ‘CertificateBatchHandler’ object has no attribute 'certificates\_to\_issue’ I followed this website I’ve aleady checked other post about this error but it d… --- ## [Blockcerts issued on Ethereum network](https://community.blockcerts.org/t/blockcerts-issued-on-ethereum-network/3215)
**Author:** [@klc224](https://community.blockcerts.org/u/klc224)\ **Replies:** 2\ **Last updated:** [June 15, 2022, 5:04pm UTC](https://community.blockcerts.org/t/blockcerts-issued-on-ethereum-network/3215 "2022-06-15T17:04:40Z")
Hello! Can anyone provide me with an example of a Blockcert issued on the Ethereum network? Looking for references to use for a prospective project. I am only seeing certs issued on Bitcoin. Any assistance would be great… --- ## [ModuleNotFoundError: No module named 'ethereum'](https://community.blockcerts.org/t/modulenotfounderror-no-module-named-ethereum/2272)
**Author:** [@JustNET](https://community.blockcerts.org/u/JustNET)\ **Replies:** 1\ **Last updated:** [May 31, 2022, 9:03pm UTC](https://community.blockcerts.org/t/modulenotfounderror-no-module-named-ethereum/2272 "2022-05-31T21:03:18Z")
Hi, thanks for the good work done. I am trying to run cert-issuer using Ethereum but I have the error No module named ‘ethereum’ as could be seen below. Also included is my conf.ini file. I have already read other posts … --- ## [Blockcerts aplicados al sistema educativo](https://community.blockcerts.org/t/blockcerts-aplicados-al-sistema-educativo/3186)
**Author:** [@legui\_1915](https://community.blockcerts.org/u/legui_1915)\ **Replies:** 0\ **Last updated:** [May 19, 2022, 6:26pm UTC](https://community.blockcerts.org/t/blockcerts-aplicados-al-sistema-educativo/3186 "2022-05-19T18:26:19Z")
Buenas soy Roberto. Estoy investigando acerca de esta tecnología aplicada al sistema administrativo de la la educacion en todos sus niveles. me podrían dar puntos claves donde para continuar mi linea de investigación, … --- ## [Blockcerts Implementation "guidance"](https://community.blockcerts.org/t/blockcerts-implementation-guidance/3184)
**Author:** [@Raebal1419](https://community.blockcerts.org/u/Raebal1419)\ **Replies:** 0\ **Last updated:** [May 19, 2022, 6:23am UTC](https://community.blockcerts.org/t/blockcerts-implementation-guidance/3184 "2022-05-19T06:23:08Z")
Greetings All, I would like to implement blockcerts solution and integrated with our LMS . We would like to request is to have a technical trainer that can guide us through this process. If one interested please conta… --- ## [Blockcerts Implementation](https://community.blockcerts.org/t/blockcerts-implementation/3183)
**Author:** [@Raebal1419](https://community.blockcerts.org/u/Raebal1419)\ **Replies:** 0\ **Last updated:** [May 19, 2022, 6:20am UTC](https://community.blockcerts.org/t/blockcerts-implementation/3183 "2022-05-19T06:20:52Z")
Greetings All, I would like to implement blockcerts solution and integrated with our LMS . My request is to have a technical trainer that can guide us through this process. If one interested please contact me at rmuh… --- ## [Flask app Cert-Issuer for Ethereum](https://community.blockcerts.org/t/flask-app-cert-issuer-for-ethereum/3089)
**Author:** [@nitinb](https://community.blockcerts.org/u/nitinb)\ **Replies:** 3\ **Last updated:** [May 18, 2022, 1:23pm UTC](https://community.blockcerts.org/t/flask-app-cert-issuer-for-ethereum/3089 "2022-05-18T13:23:27Z")
I am looking to run Cert issuer module as a Flask App. So instead of using command line : cert-issuer -c conf\_ethtest.ini \[ I am able to generate an Ethereum ropsten certificate thru this command\] It should be a Flask… --- ## [Error Installing Cert-Tools and Cert-Issuer in a Single Docker container. Getting Coincurve Error](https://community.blockcerts.org/t/error-installing-cert-tools-and-cert-issuer-in-a-single-docker-container-getting-coincurve-error/3177)
**Author:** [@nitinb](https://community.blockcerts.org/u/nitinb)\ **Replies:** 2\ **Last updated:** [May 18, 2022, 1:21pm UTC](https://community.blockcerts.org/t/error-installing-cert-tools-and-cert-issuer-in-a-single-docker-container-getting-coincurve-error/3177 "2022-05-18T13:21:02Z")
I am trying to create a single docker file where cert-tools and cert-issuer coexist. Recently I made progress with cert-tools . I was able to create a docker image where cert-tools is installed and running. Now I am t… --- ## [Could not retrieve a JSON-LD document from the URL](https://community.blockcerts.org/t/could-not-retrieve-a-json-ld-document-from-the-url/2703)
**Author:** [@yosuke](https://community.blockcerts.org/u/yosuke)\ **Replies:** 4\ **Last updated:** [April 30, 2022, 2:41pm UTC](https://community.blockcerts.org/t/could-not-retrieve-a-json-ld-document-from-the-url/2703 "2022-04-30T14:41:28Z")
Hi I could not issue the certification with Blockerts V3 from cert-tool. When I run this command, I got the error below. python3 cert\_issuer -c conf\_ethtest.ini i suspect that this problem is because of pyld as you c… --- ## [Getting Invalid Bitcoin address error while executing "bitcoin-cli sendtoaddress $issuer 5" command](https://community.blockcerts.org/t/getting-invalid-bitcoin-address-error-while-executing-bitcoin-cli-sendtoaddress-issuer-5-command/3158)
**Author:** [@prashant0912](https://community.blockcerts.org/u/prashant0912)\ **Replies:** 0\ **Last updated:** [April 28, 2022, 10:09am UTC](https://community.blockcerts.org/t/getting-invalid-bitcoin-address-error-while-executing-bitcoin-cli-sendtoaddress-issuer-5-command/3158 "2022-04-28T10:09:54Z")
Hi, I am getting Invalid Bitcoin address error while executing “bitcoin-cli sendtoaddress $issuer 5” command. I am copying the issuing address from config.ini file ,please let me know from where I can get the “sendtoadd… --- ## [Problem installing blockcerts cert-issuer](https://community.blockcerts.org/t/problem-installing-blockcerts-cert-issuer/3128)
**Author:** [@DianaMirila](https://community.blockcerts.org/u/DianaMirila)\ **Replies:** 3\ **Last updated:** [April 25, 2022, 1:59pm UTC](https://community.blockcerts.org/t/problem-installing-blockcerts-cert-issuer/3128 "2022-04-25T13:59:12Z")
Hi, I am trying to install the blockcerts cert-issuer and it results on giving me this error that I don’t quite understand: Error: Config setting for -rpcport only applied on regtest network when in \[regtest\] section. … --- ## [Adding support for hashlink images](https://community.blockcerts.org/t/adding-support-for-hashlink-images/3139)
**Author:** [@lemoustachiste](https://community.blockcerts.org/u/lemoustachiste)\ **Replies:** 0\ **Last updated:** [April 6, 2022, 4:28pm UTC](https://community.blockcerts.org/t/adding-support-for-hashlink-images/3139 "2022-04-06T16:28:29Z")
Hi all, with Blockcerts v3 we have added to option to support hashlinks in the display html property. The reasoning behind this addition is to limit the size of the final certificate as we were mostly relying on base64… --- ## [Blockcert-v3 Invalid JSON-LD syntax; @context must be an object](https://community.blockcerts.org/t/blockcert-v3-invalid-json-ld-syntax-context-must-be-an-object/3126)
**Author:** [@mposdev21](https://community.blockcerts.org/u/mposdev21)\ **Replies:** 2\ **Last updated:** [April 6, 2022, 4:19pm UTC](https://community.blockcerts.org/t/blockcert-v3-invalid-json-ld-syntax-context-must-be-an-object/3126 "2022-04-06T16:19:03Z")
Hi, I am trying to run the python application cert\_issuer and when I use the sample verifiable\_credential.json, I end up with an issue: pyld.jsonld.JsonLdError: (‘Invalid JSON-LD syntax; @context must be an object.’,) … --- ## [Issue with wallet fund: cert\_issuer.errors.InsufficientFundsError](https://community.blockcerts.org/t/issue-with-wallet-fund-cert-issuer-errors-insufficientfundserror/2956)
**Author:** [@Hawary](https://community.blockcerts.org/u/Hawary)\ **Replies:** 6\ **Last updated:** [October 14, 2021, 6:43am UTC](https://community.blockcerts.org/t/issue-with-wallet-fund-cert-issuer-errors-insufficientfundserror/2956 "2021-10-14T06:43:49Z")
I am getting this error and i am not sure what is the problem… Any ideas? WARNING - \[WinError 10061\] No connection could be made because the target machine actively refused it WARNING - address mjb7Azb3573iuMrMtgWEFdf… --- ## [How is the issuer working with the app?](https://community.blockcerts.org/t/how-is-the-issuer-working-with-the-app/3108)
**Author:** [@rroman](https://community.blockcerts.org/u/rroman)\ **Replies:** 2\ **Last updated:** [March 17, 2022, 11:38am UTC](https://community.blockcerts.org/t/how-is-the-issuer-working-with-the-app/3108 "2022-03-17T11:38:42Z")
How can you register as an issuer? Is the same app for issuers? How is the communication with the recipient? I mean, How the issuer finds all the recipients (I didn’t add my e-mail in the registration proccess)? What a… --- ## [Cert-tools create-certificate-template not found](https://community.blockcerts.org/t/cert-tools-create-certificate-template-not-found/2559)
**Author:** [@tommparekh](https://community.blockcerts.org/u/tommparekh)\ **Replies:** 1\ **Last updated:** [March 16, 2022, 9:04pm UTC](https://community.blockcerts.org/t/cert-tools-create-certificate-template-not-found/2559 "2022-03-16T21:04:09Z")
I ran pip install command but do not see create-certificate-template.py. How do I proceed? Here is a link I used: Steps I followed: Thanks --- ## [Important vulnerability patched: unhashed display property](https://community.blockcerts.org/t/important-vulnerability-patched-unhashed-display-property/3109)
**Author:** [@lemoustachiste](https://community.blockcerts.org/u/lemoustachiste)\ **Replies:** 0\ **Last updated:** [March 8, 2022, 8:03pm UTC](https://community.blockcerts.org/t/important-vulnerability-patched-unhashed-display-property/3109 "2022-03-08T20:03:00Z")
Hi, yesterday we discovered that the display property was not properly hashed with Blockcerts v3. We have identified the issue and patched the different libraries (blockcerts verifier still in progress at this moment). … [Previous page](https://community.blockcerts.org/latest.md?page=2) [Next page](https://community.blockcerts.org/latest.md?page=4)