Transactions
Send Transactions to the Blockchain and query information about them.
POST Send Transaction
https://api.elrond.com/transaction/send
This endpoint allows one to send a signed Transaction to the Blockchain.
Body Parameters
| Param | Required | Type | Description |
|---|---|---|---|
| version | REQUIRED | number | The Version of the Transaction (e.g. 1). |
| chainID | REQUIRED | string | The Chain identifier. |
| nonce | REQUIRED | number | The Nonce of the Sender. |
| value | REQUIRED | string | The Value to transfer (can be zero). |
| sender | REQUIRED | string | The Address (bech32) of the Sender. |
| receiver | REQUIRED | string | The Address (bech32) of the Receiver. |
| gasPrice | REQUIRED | number | The desired Gas Price (per Gas Unit). |
| gasLimit | REQUIRED | number | The maximum amount of Gas Units to consume. |
| data | OPTIONAL | string | The message (data) of the Transaction. |
| signature | REQUIRED | string | The Signature (hex-encoded) of the Transaction. |
🟢 200: OK
Transaction sent with success. A Transaction Hash is returned.
{
"txHash": "6c41c71946b5b428c2cfb560e3ea425f8a00345de4bb2eb1b784387790914277"
}
🔴 400: Bad request
Invalid Transaction signature.
{
"error": "transaction generation failed: ed25519: invalid signature"
}
warning
For Nodes (Observers or Validators with the HTTP API enabled), this endpoint only accepts transactions whose sender is in the Node's Shard.
Here's an example of a request:
POST https://api.elrond.com/transaction/send HTTP/1.1
Content-Type: application/json
{
"version": 1,
"chainId": "v1.0.141",
"nonce": 42,
"value": "100000000000000000",
"receiver": "erd1cux02zersde0l7hhklzhywcxk4u9n4py5tdxyx7vrvhnza2r4gmq4vw35r",
"sender": "erd1njqj2zggfup4nl83x0nfgqjkjserm7mjyxdx5vzkm8k0gkh40ezqtfz9lg",
"gasPrice": 1000000000,
"gasLimit": 70000,
"data": "food for cats",
"signature": "93207c579bf57be03add632b0e1624a73576eeda8a1687e0fa286f03eb1a17ffb125ccdb008a264c402f074a360442c7a034e237679322f62268b614e926d10f"
}
POST Send Multiple Transactions
https://api.elrond.com/transaction/send-multiple
This endpoint allows one to send a bulk of Transactions to the Blockchain.
Body Parameters
| Param | Required | Type | Description |
|---|---|---|---|
| version | REQUIRED | number | The Version of the Transaction (e.g. 1). |
| chainID | REQUIRED | string | The Chain identifier. |
| nonce | REQUIRED | number | The Nonce, for each Transaction. |
| value | REQUIRED | string | The Value, for each Transaction. |
| sender | REQUIRED | string | The Address of the Sender, for each Transaction. |
| receiver | REQUIRED | string | The Address of the Receiver, for each Transaction. |
| gasPrice | REQUIRED | number | The Gas Price, for each Transaction. |
| gasLimit | REQUIRED | number | The Gas Limit, for each Transaction. |
| data | OPTIONAL | string | The message (data), for each Transaction. |
| signature | REQUIRED | string | The Signature, for each Transaction. |
🟢 200: OK
A bulk of Transactions were successfully sent.
{
"numOfSentTxs": 2,
"txsHashes": {
"0": "6c41c71946b5b428c2cfb560e3ea425f8a00345de4bb2eb1b784387790914277",
"1": "fa8195bae93d4609a6fc5972a7a6176feece39a6c4821acae2276701aee12fb0"
}
}
warning
For Nodes (Observers or Validators with the HTTP API enabled), this endpoint only accepts transactions whose sender is in the Node's Shard.
Here's an example of a request:
POST https://api.elrond.com/transaction/send-multiple HTTP/1.1
Content-Type: application/json
[
{
"nonce": 42,
"value": "100000000000000000",
"receiver": "erd1cux02zersde0l7hhklzhywcxk4u9n4py5tdxyx7vrvhnza2r4gmq4vw35r",
"sender": "erd1njqj2zggfup4nl83x0nfgqjkjserm7mjyxdx5vzkm8k0gkh40ezqtfz9lg",
"gasPrice": 1000000000,
"gasLimit": 70000,
"data": "food for cats",
"chainId": "v1.0.141",
"version": 1,
"signature": "93207c579bf57be03add632b0e1624a73576eeda8a1687e0fa286f03eb1a17ffb125ccdb008a264c402f074a360442c7a034e237679322f62268b614e926d10f"
},
{
"nonce": 43,
"value": "100000000000000000",
"receiver": "erd1cux02zersde0l7hhklzhywcxk4u9n4py5tdxyx7vrvhnza2r4gmq4vw35r",
"sender": "erd1rhp4q3qlydyrrjt7dgpfzxk8n4f7yrat4wc6hmkmcnmj0vgc543s8h7hyl",
"gasPrice": 1000000000,
"gasLimit": 70000,
"data": "bus tickets",
"chainID": "v1.0.141",
"version": 1,
"signature": "01535fd1d40d98b7178ccfd1729b3f526ee4542482eb9f591d83433f9df97ce7b91db07298b1d14308e020bba80dbe4bba8617a96dd7743f91ee4b03d7f43e00"
}
]
POST Estimate Cost of Transaction
https://api.elrond.com/transaction/cost
This endpoint allows one to estimate the cost of a transaction.
Body Parameters
| Param | Required | Type | Description |
|---|---|---|---|
| version | REQUIRED | number | The Version of the Transaction (e.g. 1). |
| chainID | REQUIRED | string | The Chain identifier. |
| value | REQUIRED | string | The Value to transfer. |
| sender | REQUIRED | string | TThe Address of the Sender. |
| receiver | REQUIRED | string | The Address of the Receiver. |
| data | OPTIONAL | string | The message (data) of the Transaction. |
🟢 200: OK
The cost is estimated successfully.
{
"txGasUnits": "77000"
}
tip
This endpoint returns the cost on the transaction in gas units. The returned value can be used to fill in gasLimit field of the transaction.
Here's an example of a request:
POST https://api.elrond.com/transaction/cost HTTP/1.1
Content-Type: application/json
{
"value": "100000",
"sender": "erd1l453hd0gt5gzdp7czpuall8ggt2dcv5zwmfdf3sd3lguxseux2fsmsgldz",
"receiver": "erd188nydpkagtpwvfklkl2tn0w6g40zdxkwfgwpjqc2a2m2n7ne9g8q2t22sr",
"data": "this is an example",
"chainID": "v1.0.141",
"version": 1
}
GET Get Transaction
https://api.elrond.com/transaction/:txHash
This endpoint allows one to query the details of a Transaction.
Path Parameters
| Param | Required | Type | Description |
|---|---|---|---|
| txHash | REQUIRED | string | The hash (identifier) of the Transaction. |
Query Parameters
| Param | Required | Type | Description |
|---|---|---|---|
| sender | OPTIONAL | string | The Address of the sender - a hint to optimize the request. |
🟢 200: OK
Transaction details retrieved successfully.
{
"transaction": {
"type": "normal",
"nonce": 3,
"round": 186580,
"epoch": 12,
"value": "1000000000000000000",
"receiver": "erd1...",
"sender": "erd1...",
"gasPrice": 1000000000,
"gasLimit": 70000,
"data": "Zm9yIHRlc3Rz",
"signature": "1047...",
"sourceShard": 2,
"destinationShard": 1,
"blockNonce": 186535,
"miniblockHash": "e927...",
"blockHash": "50a1...",
"status": "executed"
}
}
important
The optional query parameter sender is only applicable to requests against the Proxy (not against the Observer Nodes).
GET Get Transaction Status
https://api.elrond.com/transaction/:txHash/status
This endpoint allows one to query the Status of a Transaction.
Path Parameters
| Param | Required | Type | Description |
|---|---|---|---|
| txHash | REQUIRED | string | The hash (identifier) of the Transaction. |
Query Parameters
| Param | Required | Type | Description |
|---|---|---|---|
| sender | OPTIONAL | string | The Address of the sender - a hint to optimize the request. |
🟢 200: OK
Transaction status retrieved successfully.
{
"status": "executed"
}
important
The optional query parameter sender is only applicable to requests against the Proxy (not against the Observer Nodes).