# Error: Unknown address - unable to sign transaction for this address

**URL:** <https://forum.openzeppelin.com/t/error-unknown-address-unable-to-sign-transaction-for-this-address/947>\
**Category:** SDK\
**Created:** [June 29, 2019, 11:14am UTC](https://forum.openzeppelin.com/t/error-unknown-address-unable-to-sign-transaction-for-this-address/947 "2019-06-29T11:14:26Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![itinance](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.openzeppelin.com/itinance/32/18116_2.png) [@itinance](https://forum.openzeppelin.com/u/itinance)\
**Post date:** [June 30, 2019, 7:49am UTC](https://forum.openzeppelin.com/t/error-unknown-address-unable-to-sign-transaction-for-this-address/947/3 "2019-06-30T07:49:00Z")

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Ah yes, this was it 🙂 Thanks again. Finally I use this snippet including the [HD-wallet-address-issue](https://forum.openzeppelin.com/t/deploy-to-a-public-testnet-using-zeppelinos-2-4/941/3) in order to use MyCrypto-App for managing funds and token:

```
ropsten: {
  provider: () => new HDWalletProvider(
    process.env.DEV_MNEMONIC, "https://ropsten.infura.io/v3/" + infuraProjectId, 0, 10,
    true, "m/44'/1'/0'/0/"
    ),
  network_id: 3, // Ropsten's id
  gas: 6000000,
  gasPrice: 5e9,
},

```

It gives me 10 addresses.

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