Document override functionality for eth_call and eth_estimateGas
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Signed-off-by: bgravenorst <[email protected]>
Signed-off-by: bgravenorst <[email protected]>
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macfarla
approved these changes
Jan 13, 2025
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| Optional parameter for [`eth_call`](./index.md#eth_call) and [`eth_estimateGas`](./index.md#eth_estimategas). | ||
| Override an account with the following state values temporarily before making the call. This allows you | ||
| to make temporary state changes without affecting the actual blockchain state. |
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| to make temporary state changes without affecting the actual blockchain state. | |
| to make ephemeral state changes, for the purposes of transaction simulation, without affecting the actual blockchain state. |
| <TabItem value="curl HTTP" label="curl HTTP" default> | ||
| ```bash | ||
| curl -X POST --data '{"jsonrpc":"2.0","method":"eth_call","params":[{"to":"0xdAC17F958D2ee523a2206206994597C13D831ec7","data":"0x70a08231000000000000000000000000fe3b557e8fb62b89f4916b721be55ceb828dbd73"},"latest",{"0xdAC17F958D2ee523a2206206994597C13D831ec7":{"stateDiff":{"0xd0dd44a13782bf89714335c2b2b08ecb7c074e78a161807742c578965dda1b56":"0x0000000000000000000000000000000000000000000000000000000000004E20"}}}}],"id":1}' http://127.0.0.1:8545 |
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| curl -X POST --data '{"jsonrpc":"2.0","method":"eth_call","params":[{"to":"0xdAC17F958D2ee523a2206206994597C13D831ec7","data":"0x70a08231000000000000000000000000fe3b557e8fb62b89f4916b721be55ceb828dbd73"},"latest",{"0xdAC17F958D2ee523a2206206994597C13D831ec7":{"stateDiff":{"0xd0dd44a13782bf89714335c2b2b08ecb7c074e78a161807742c578965dda1b56":"0x0000000000000000000000000000000000000000000000000000000000004E20"}}}}],"id":1}' http://127.0.0.1:8545 | |
| curl -X POST --data '{"jsonrpc":"2.0","method":"eth_call","params":[{"to":"0xdAC17F958D2ee523a2206206994597C13D831ec7","data":"0x70a08231000000000000000000000000fe3b557e8fb62b89f4916b721be55ceb828dbd73"},"latest",{"0xdAC17F958D2ee523a2206206994597C13D831ec7":{"stateDiff":{"0xd0dd44a13782bf89714335c2b2b08ecb7c074e78a161807742c578965dda1b56":"0x0000000000000000000000000000000000000000000000000000000000004E20"}}}],"id":1}' http://127.0.0.1:8545 |
| <TabItem value="curl HTTP request" label="curl HTTP request" default> | ||
| ```bash | ||
| curl -X POST --data '{"jsonrpc":"2.0","method":"eth_estimateGas","params":[{"from":"0xfe3b557e8fb62b89f4916b721be55ceb828dbd73","to":"0xdAC17F958D2ee523a2206206994597C13D831ec7","data":"0xa9059cbb000000000000000000000000627306090abaB3A6e1400e9345bC60c78a8BEf570000000000000000000000000000000000000000000000000000000000000064"},"latest",{"0xdAC17F958D2ee523a2206206994597C13D831ec7":{"stateDiff":{"0xd0dd44a13782bf89714335c2b2b08ecb7c074e78a161807742c578965dda1b56":"0x0000000000000000000000000000000000000000000000000000000000004E20"}}}}],"id":1}' http://127.0.0.1:8545 |
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| curl -X POST --data '{"jsonrpc":"2.0","method":"eth_estimateGas","params":[{"from":"0xfe3b557e8fb62b89f4916b721be55ceb828dbd73","to":"0xdAC17F958D2ee523a2206206994597C13D831ec7","data":"0xa9059cbb000000000000000000000000627306090abaB3A6e1400e9345bC60c78a8BEf570000000000000000000000000000000000000000000000000000000000000064"},"latest",{"0xdAC17F958D2ee523a2206206994597C13D831ec7":{"stateDiff":{"0xd0dd44a13782bf89714335c2b2b08ecb7c074e78a161807742c578965dda1b56":"0x0000000000000000000000000000000000000000000000000000000000004E20"}}}}],"id":1}' http://127.0.0.1:8545 | |
| curl -X POST --data '{"jsonrpc":"2.0","method":"eth_estimateGas","params":[{"from":"0xfe3b557e8fb62b89f4916b721be55ceb828dbd73","to":"0xdAC17F958D2ee523a2206206994597C13D831ec7","data":"0xa9059cbb000000000000000000000000627306090abaB3A6e1400e9345bC60c78a8BEf570000000000000000000000000000000000000000000000000000000000000064"},"latest",{"0xdAC17F958D2ee523a2206206994597C13D831ec7":{"stateDiff":{"0xd0dd44a13782bf89714335c2b2b08ecb7c074e78a161807742c578965dda1b56":"0x0000000000000000000000000000000000000000000000000000000000004E20"}}}],"id":1}' http://127.0.0.1:8545 |
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when looking at this example in the preview it's all on one line, vs the previous example which is formatted over multiple lines.
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| Libraries such as [web3j](https://github.com/web3j/web3j) or [ethereumj](https://github.com/ethereum/ethereumj) and tools such as [MyCrypto](https://mycrypto.com/) can also create signed transactions. | ||
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did you mean to remove this section @bgravenorst
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Description
Documented the ability to override the contract state before making calls using
eth_callandeth_estimateGasIssue(s) fixed
Fixes #1738
Preview
https://besu-docs-git-fork-bgravenorst-doc-1738-hyperledger.vercel.app/public-networks/reference/api#eth_call
https://besu-docs-git-fork-bgravenorst-doc-1738-hyperledger.vercel.app/public-networks/reference/api#eth_estimategas
https://besu-docs-git-fork-bgravenorst-doc-1738-hyperledger.vercel.app/public-networks/reference/api/objects#state-override-object
https://besu-docs-git-fork-bgravenorst-doc-1738-hyperledger.vercel.app/public-networks/how-to/send-transactions#override-state-values