TypeError: Cannot read property 'number' of null

[naszam]

Hi,

I'm trying to deploy on Kovan via:

$ truffle migrate --network kovan

I'm getting the following:

/home/sencha/maker-badges/node_modules/@trufflesuite/web3-provider-engine/index.js:219
    number:           ethUtil.toBuffer(jsonBlock.number),
TypeError: Cannot read property 'number' of null
    at toBufferBlock (/home/sencha/maker-badges/node_modules/@trufflesuite/web3-provider-engine/index.js:219:50)
    at /home/sencha/maker-badges/node_modules/@trufflesuite/web3-provider-engine/index.js:60:27
    at /home/sencha/maker-badges/node_modules/@trufflesuite/web3-provider-engine/index.js:136:12
    at /home/sencha/maker-badges/node_modules/@trufflesuite/web3-provider-engine/index.js:199:9
    at /home/sencha/maker-badges/node_modules/async/internal/once.js:12:16
    at replenish (/home/sencha/maker-badges/node_modules/async/internal/eachOfLimit.js:61:25)
    at /home/sencha/maker-badges/node_modules/async/internal/eachOfLimit.js:71:9
    at eachLimit (/home/sencha/maker-badges/node_modules/async/eachLimit.js:43:36)
    at /home/sencha/maker-badges/node_modules/async/internal/doLimit.js:9:16
    at end (/home/sencha/maker-badges/node_modules/@trufflesuite/web3-provider-engine/index.js:176:5)
    at /home/sencha/maker-badges/node_modules/@trufflesuite/web3-provider-engine/subproviders/provider.js:19:5
    at XMLHttpRequest.request.onreadystatechange (/home/sencha/maker-badges/node_modules/web3-providers-http/src/index.js:96:13)
    at XMLHttpRequestEventTarget.dispatchEvent (/home/sencha/maker-badges/node_modules/xhr2-cookies/xml-http-request-event-target.ts:44:13)
    at XMLHttpRequest._setReadyState (/home/sencha/maker-badges/node_modules/xhr2-cookies/xml-http-request.ts:219:8)
    at XMLHttpRequest._onHttpResponseEnd (/home/sencha/maker-badges/node_modules/xhr2-cookies/xml-http-request.ts:345:8)
    at IncomingMessage.<anonymous> (/home/sencha/maker-badges/node_modules/xhr2-cookies/xml-http-request.ts:311:39)
    at IncomingMessage.emit (events.js:327:22)
    at endReadableNT (_stream_readable.js:1201:12)
    at processTicksAndRejections (internal/process/task_queues.js:84:21)

I'm using:

• Truffle v5.1.32
• @truffle/hdwallet-provider v1.0.36
• Ubuntu 18.04
• npm v13.13.0

[CruzMolina]

Thanks for reporting @naszam ! @ltfschoen has a fix for this in trufflesuite/provider-engine#6. Closing as a duplicate of #3130 .

[CruzMolina]

Until this goes out in our official weekly release, the fix for this is out at @truffle/hdwallet-provider@next.

Please give it a shot and let us know if this particular error has been resolved! 🙏

[naszam]

Great! Thanks!
I'll do it!

[naszam]

It worked! Thanks a lot!

[garethcurtis]

Hi - not sure if this is helpful or not but FYI....

I was using
truffle console --network ropsten
And then once connected:
migrate --reset

And the above error still occurs for me, even in 5.1.33. Connect to the network, within 20 seconds or so, that error appears.

However, I did what naszam said and instead used:
truffle migrate --network ropsten

And it's all good. Thanks!

[CruzMolina]

Hey @garethcurtis, are you using @truffle/hdwallet-provider@latest?

[garethcurtis]

Hi @CruzMolina does that came as part of 5.1.33? I assumed so... If not then sorry, nope.

[CruzMolina]

@garethcurtis , @truffle/hdwallet-provider is a separate pkg from truffle.

[garethcurtis]

OK, sorry, new to this. I normally do Objective C/Swift on iOS :)

I thought hdwallet-provider came as part of @trufflesuite/web3-provider-engine@14.0.7. Apologies. I will try and figure out how to get hdwallet-provider separately! Thanks @CruzMolina

I managed to get the contract deployed anyway, so all good from that perspective.

[CruzMolina]

No worries @garethcurtis , @truffle/hdwallet-provider includes @trufflesuite/web3-provider-engine as a dependency. To install and use @truffle/hdwallet-provider, run npm install @truffle/hdwallet-provider and see the README for configuration.