# BLOCKCHAIN_SIGNER_KEYPAIR · Rell standard library · Chromia Docs (concept)

> val BLOCKCHAIN_ SIGNER_ KEYPAIR: keypair = rell.test.keypair{pub=0x0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c,priv=0x42424242424242

Source: https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/rell.test/-b-l-o-c-k-c-h-a-i-n_-s-i-g-n-e-r_-k-e-y-p-a-i-r/

PROPERTY

# BLOCKCHAIN\_SIGNER\_KEYPAIR

```signature
val BLOCKCHAIN_SIGNER_KEYPAIR: keypair = rell.test.keypair{pub=0x0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c,priv=0x4242424242424242424242424242424242424242424242424242424242424242}
```

The test keypair used to sign all blocks built in the test context.

**Not secure - unsuitable for production usage.**

Since 0.11.0

[View this page on docs.chromia.com](https://docs.chromia.com/pages/rell-stdlib/-rell%20-system%20-library/rell.test/-b-l-o-c-k-c-h-a-i-n_-s-i-g-n-e-r_-k-e-y-p-a-i-r.html)Generated API reference, mirrored from the live docs