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Updated revert reason example (#1754)

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Signed-off-by: Adrian Sutton <adrian.sutton@consensys.net>
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MadelineMurray 5 years ago committed by GitHub
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  1. 23
      docs/Using-Pantheon/Transactions/Revert-Reason.md

23
docs/Using-Pantheon/Transactions/Revert-Reason.md
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@ -36,7 +36,7 @@ to include the revert reason in the transaction receipt in Pantheon.
## Where is the Revert Reason Included ## Where is the Revert Reason Included
When revert reason is enabled, the revert reason is included in the transaction receipt returned by When revert reason is enabled, the revert reason is included as an ABI-encoded string in the transaction receipt returned by
[`eth_getTransactionReceipt`](../../Reference/Pantheon-API-Methods.md#eth_gettransactionreceipt). [`eth_getTransactionReceipt`](../../Reference/Pantheon-API-Methods.md#eth_gettransactionreceipt).
!!! important !!! important
@ -62,12 +62,29 @@ When revert reason is enabled, the revert reason is included in the transaction
"to": "0xf17f52151ebef6c7334fad080c5704d77216b732", "to": "0xf17f52151ebef6c7334fad080c5704d77216b732",
"transactionHash": "0xc00e97af59c6f88de163306935f7682af1a34c67245e414537d02e422815efc3", "transactionHash": "0xc00e97af59c6f88de163306935f7682af1a34c67245e414537d02e422815efc3",
"transactionIndex": "0x0", "transactionIndex": "0x0",
"revertReason":"Not enough Ether provided" "revertReason":"0x08c379a00000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000001a4e6f7420656e6f7567682045746865722070726f76696465642e000000000000"
} }
} }
``` ```
## Dapp support ## Revert Reason Format
As described in the [Solidity documentation](https://solidity.readthedocs.io/en/v0.5.10/control-structures.html#revert),
the revert reason is included as an ABI-encoded string consisting of:
```
0x08c379a0 // Function selector for Error(string)
0x0000000000000000000000000000000000000000000000000000000000000020 // Data offset
0x000000000000000000000000000000000000000000000000000000000000001a // String length
0x4e6f7420656e6f7567682045746865722070726f76696465642e000000000000 // String data
```
!!! example
```bash tab="Revert reason string for Not enough Ether provided."
"0x08c379a00000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000001a4e6f7420656e6f7567682045746865722070726f76696465642e000000000000"
```
## Dapp Support
Client libraries (eg, web3j) do not support extracting the revert reason from the transaction receipt. Client libraries (eg, web3j) do not support extracting the revert reason from the transaction receipt.
To extract the revert reason your Dapp must interact directly with Pantheon using a custom JSON -> Object To extract the revert reason your Dapp must interact directly with Pantheon using a custom JSON -> Object

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