# UniswapV2SlidingOracle: cannot estimate gas

**URL:** https://forum.openzeppelin.com/t/uniswapv2slidingoracle-cannot-estimate-gas/4897
**Category:** Defender
**Created:** [December 3, 2020, 10:08am UTC](https://forum.openzeppelin.com/t/uniswapv2slidingoracle-cannot-estimate-gas/4897 "2020-12-03T10:08:12Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![Mash](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.openzeppelin.com/mash/32/3364_2.png) [@Mash](https://forum.openzeppelin.com/u/Mash)
#### Post date: [December 3, 2020, 10:08am UTC](https://forum.openzeppelin.com/t/uniswapv2slidingoracle-cannot-estimate-gas/4897/1 "2020-12-03T10:08:12Z")

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I like it! Thanks When running the faster script the Uniswap task gets an error:

> Error working UniswapV2SlidingOracle: cannot estimate gas; transaction may fail or may require manual gas limit (error={"code":3,"data":"0

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### Author: ![spalladino](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.openzeppelin.com/spalladino/32/22_2.png) [@spalladino](https://forum.openzeppelin.com/u/spalladino)
#### Post date: [December 3, 2020, 12:39pm UTC](https://forum.openzeppelin.com/t/uniswapv2slidingoracle-cannot-estimate-gas/4897/2 "2020-12-03T12:39:21Z")

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> [@Mash](#):
>
> I like it! Thanks When running the faster script the Uniswap task gets an error:

Hmm I can no longer find that Job in [https://keep3r.network/](https://keep3r.network/). Perhaps it was removed from the network, that's why it fails? Can you check if there is any info in [https://gov.yearn.finance/](https://gov.yearn.finance/)?

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### Author: ![Mash](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.openzeppelin.com/mash/32/3364_2.png) [@Mash](https://forum.openzeppelin.com/u/Mash)
#### Post date: [December 4, 2020, 7:42am UTC](https://forum.openzeppelin.com/t/uniswapv2slidingoracle-cannot-estimate-gas/4897/3 "2020-12-04T07:42:45Z")

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> [@Mash](#):
>
> UniswapV2SlidingOracle

I only found this post with no answer [https://gov.yearn.finance/t/uniswapv2slidingoracle-vs-keep3rv1oracle-job/8232](https://gov.yearn.finance/t/uniswapv2slidingoracle-vs-keep3rv1oracle-job/8232)

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### Author: ![Bolo](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.openzeppelin.com/bolo/32/3369_2.png) [@Bolo](https://forum.openzeppelin.com/u/Bolo)
#### Post date: [December 5, 2020, 11:56pm UTC](https://forum.openzeppelin.com/t/uniswapv2slidingoracle-cannot-estimate-gas/4897/4 "2020-12-05T23:56:25Z")

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bc there are only 0.017 credits left

> **[Keep3r.live, tracking the statistics of keep3r.network](https://keep3r.live/job/0xca2e2df6a7a7cf5bd19d112e8568910a6c2d3885)**