EthSigner API methods
- All JSON-RPC HTTP examples use the default host and port endpoint
http://127.0.0.1:8545. If using the--http-listen-hostor--http-listen-portoptions, update the endpoint. - The examples use Hyperledger Besu, but any Ethereum client can be used.
EEA methods
eea_sendTransaction
Creates and signs a private transaction using the signing key.
EthSigner submits the signed transaction to Besu using eea_sendRawTransaction.
Besu uses a Transaction Manager to implement privacy. Tessera is the Transaction Manager used in this documentation but EthSigner can be used with other Transaction Managers.
Parameters
Transaction object for private transactions:
| Key | Type | Required/Optional | Value | |
|---|---|---|---|---|
| from | Data, 20 bytes | Required | Address of the sender. Must be the address of the keystore account. | |
| to | Data, 20 bytes | Not required for contract creation | null for contract creation transaction. Contract address for contract invocation transactions. | |
| gas | Quantity | Optional | Gas provided by the sender. Default is 90000. | |
| gasPrice | Quantity | Optional | Gas price provided by the sender in Wei. Default is 0. | |
| nonce | Quantity | Optional | Number of transactions sent from the from account before this one. | |
| data | Quantity | Optional | Compiled contract code or hash of the invoked method signature and encoded parameters. | |
| privateFrom | Data, 20 bytes | Required | Tessera address of the sender | |
| privateFor or privacyGroupId | Array of data or data | Required | Tessera addresses of recipients or privacy group ID | |
| restriction | String | Required | Must be restricted |
Submitting a transaction with the same nonce as a pending transaction and a higher gas price replaces the pending transaction with the new one. Use priv_getTransactionCount to calculate the nonce.
If not attempting to replace a pending transaction, do not include the nonce in the private transaction object and nonce management is handled automatically.
If a non-zero value is included in the transaction object, an error is returned. Ether transfers cannot be private transactions.
Returns
result : data - Transaction hash
- curl with privateFor
- curl with privacy group ID
- JSON result
curl -X POST --data '{"jsonrpc":"2.0","method":"eea_sendTransaction","params":[{"from": "0xfe3b557e8fb62b89f4916b721be55ceb828dbd73","data": "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", "privateFrom": "negmDcN2P4ODpqn/6WkJ02zT/0w0bjhGpkZ8UP6vARk=","privateFor": ["g59BmTeJIn7HIcnq8VQWgyh/pDbvbt2eyP0Ii60aDDw="],"restriction": "restricted"}], "id":1}' http://127.0.0.1:8545
curl -X POST --data '{"jsonrpc":"2.0","method":"eea_sendTransaction","params":[{"from": "0xfe3b557e8fb62b89f4916b721be55ceb828dbd73","data": "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", "privateFrom": "negmDcN2P4ODpqn/6WkJ02zT/0w0bjhGpkZ8UP6vARk=","privacyGroupId": "kAbelwaVW7okoEn1+okO+AbA4Hhz/7DaCOWVQz9nx5M=","restriction": "restricted"}], "id":1}' http://127.0.0.1:8545
{
"jsonrpc": "2.0",
"id": 1,
"result": "0x6052dd2131667ef3e0a0666f2812db2defceaec91c470bb43de92268e8306778"
}
Eth methods
eth_accounts
Returns the account address with which EthSigner is signing transactions. That is, the account of the signing key.
Returns multiple accounts if multiple signers are configured.
Parameters
None
Returns
Array of data : Account address with which EthSigner is signing transactions.
- curl HTTP request
- JSON result
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_accounts","params":[],"id":1}' http://127.0.0.1:8545
{
"jsonrpc": "2.0",
"id": 1,
"result": ["0xfe3b557e8fb62b89f4916b721be55ceb828dbd73"]
}
eth_sendTransaction
Creates and signs a transaction using the signing key.
EthSigner submits the signed transaction to Besu using eth_sendRawTransaction.
Parameters
Transaction object:
| Key | Type | Required/Optional | Value |
|---|---|---|---|
| from | Data, 20 bytes | Required | Address of the sender. |
| to | Data, 20 bytes | Optional for contract creation | Address of the receiver. null if a contract creation transaction. |
| gas | Quantity | Optional | Gas provided by the sender. Default is 90000. |
| gasPrice | Quantity | Optional | Gas price provided by the sender in Wei. Default is 0. |
| nonce | Quantity | Optional | Number of transactions made by the sender before this one. Must be specified if using GoQuorum. |
| value | Quantity | Optional | Value transferred in Wei. |
| data | Quantity | Optional | Compiled contract code or hash of the invoked method signature and encoded parameters. |
Submitting a transaction with the same nonce as a pending transaction and a higher gas price replaces the pending transaction with the new one.
Returns
result : data - 32-byte transaction hash
- curl HTTP request
- JSON result
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_sendTransaction","params":[{"from": "0xfe3b557e8fb62b89f4916b721be55ceb828dbd73","to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567","gas": "0x7600","gasPrice": "0x9184e72a000","value": "0x9184e72a"}], "id":1}' http://127.0.0.1:8545
{
"jsonrpc": "2.0",
"id": 1,
"result": "0x6052dd2131667ef3e0a0666f2812db2defceaec91c470bb43de92268e8306778"
}
eth_sign
Calculates an Ethereum specific signature using sign(keccak256("\x19Ethereum Signed Message:\n" + len(message) + message)))."
Adds a prefix to the message that makes the calculated signature recognizable as an Ethereum specific signature. This prevents misuse where a malicious DApp signs arbitrary data (for example a transaction) and uses the signature to impersonate the victim.
Parameters
DATA : 20-byte account address
DATA : data string to sign
Returns
DATA : Signature
- curl HTTP request
- JSON result
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_sign","params":["0x78e6e236592597c09d5c137c2af40aecd42d12a2", "0x2eadbe1f"], "id":1}' http://127.0.0.1:8545
{
"jsonrpc": "2.0",
"id": 1,
"result": "0xa6122e277f46fea78f3e97d3354a03ad20b2296733dfefbadc7305c80e70ce9826d44f12ab5aa488689744657491c70d3b654d7f60f8f50beefac9abcf02a4cf1b"
}
eth_signTransaction
Signs a transaction that can be submitted to Besu at a later time using eth_sendRawTransaction.
Parameters
Transaction object:
| Key | Type | Required/Optional | Value |
|---|---|---|---|
| from | Data, 20 bytes | Required | Address of the sender. |
| to | Data, 20 bytes | Optional for contract creation | Address of the receiver. null if a contract creation transaction. |
| gas | Quantity | Optional | Gas provided by the sender. Default is 90000. |
| gasPrice | Quantity | Optional | Gas price provided by the sender in Wei. Default is 0. |
| nonce | Quantity | Optional | Number of transactions made by the sender before this one. Must be specified if using GoQuorum. |
| value | Quantity | Optional | Value transferred in Wei. |
| data | Quantity | Optional | Compiled contract code or hash of the invoked method signature and encoded parameters. |
Returns
result : data - The signed transaction object.
- curl HTTP request
- JSON result
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_signTransaction","params":[{"from": "0xfe3b557e8fb62b89f4916b721be55ceb828dbd73","to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567","gas": "0x7600","gasPrice": "0x9184e72a000","value": "0x9184e72a", "nonce":"0x46"}], "id":1}' http://127.0.0.1:8545
{
"jsonrpc": "2.0",
"id": 1,
"result": "0xa3f20717a250c2b0b729b7e5becbff67fdaef7e0699da4de7ca5895b02a170a12d887fd3b17bfdce3481f10bea41f45ba9f709d39ce8325427b57afcfc994cee1b"
}