⚡Blockchains

We support all major public blockchains

expand.network provides connectivity to various EVM and Non-EVM based chains for both, query(Read) and transaction(Write). So now, the developer does not need to worry about how different blockchains work. The developer will be required to know only the chainID to perform multiple operations on different chains.

For example, if a developer wants to send two transactions, one on the Ethereum mainnet and another on Solana, then they just need to call the sendtransaction API with different chain IDs in the request body.

Following are the common APIs implemented for all the various chains:-

Name	Type	Description
getbalance	Read	Get the balance or number of the given token in the requested public address.
getblock	Read	Get details of a block.
getgasprice	Read	Get the current gas price from the network.
getstorage	Read	Get data stored in the given slot.
gettransaction	Read	Get details of a transaction.
getpublicrpc	Read	Get the RPC of required chain.
getgasfees	Read	Retrieves gas fee spent in a particular range.
getusertransactions	Read	Get the historical transaction details for a specific user address. Available on Ethereum, Binance Smart Chain, Avalanche - P/C/X, Polygon, Fantom, Stellar and TON.
gethistoricalrewards	Read	Get the historical transaction details focusing on staking rewards for a specific user address. Available on Avax-P.
getevents	Read	Get a filtered list of events emitted by a given ledger range, within a maximum 24 hours of recent ledgers. Currently available on Stellar.
getlatestledger	Read	Get details for the current latest known ledger of the node. Currently available on Stellar.
portfolio	Read	Get detailed information about the verified assets or tokens currently associated with a user's wallet address. Available on Ethereum as well as Arbitrum, Avalanche, Base, Binance Smart Chain, Cronos, Fantom, Near, Optimism, Polygon, Stellar and Solana.
getflashbotblocks	Read	Get details of the flashbot blocks.
getflashbottransactions	Read	Get details of the flashbot transactions.
getflashbotbundle	Read	Get details of the specified flashbot bundle.
gettokenmarketdata	Read	Get the market data for a given asset on the Ethereum chain.
gettokenmapping	Read	Get the top 40 popular tokens on the EVM chains
getapprovaldata	Read	Retrieves approval-related information for a specified address, including token details, amount approved, spender, risk factor, value at risk, and timestamp. Currently supported for Ethereum chain.
createfeetransaction	Write	This endpoint lets users collect fees on transactions via the Expand API or plug-in.
estimategas	Write	Generates and returns an estimate of how much gas would be necessary to complete a transaction.
settrustline	Write	Implement a trustline between issuer and distributor. Currently available on Stellar.
rwa/issue	Write	Executes a payment operation to create (or mint) an asset on the Stellar network.
rwa/freeze	Write	Executes a transaction to revoke an existing trustline’s authorization, thereby freezing the asset held by an account on the Stellar network.
rwa/burn	Write	Executes a transaction to burn or delete an asset on the Stellar network.
rwa/transfer	Write	Trigger a payment operation to send an amount in a specific asset (XLM or non-XLM) to a destination account on the Stellar network.
sendtransaction	Write	Sign and send transactions on the chain.
createaccount	write	Initiates a transaction to fund a newly created account using the public key as the account ID.
simulatetransaction	write	Submit a trial contract invocation to simulate how it would be executed by the network. This endpoint calculates the effective transaction data, required authorizations, and minimal resource fee. It provides a way to test and analyze the potential outcomes of a transaction without actually submitting it to the Stellar network.
genericsmartcontractmethod	Write	Calls read functions of verified smart contracts. Available on ethereum.
decodetransaction	Write	Get the decoded transaction for the provided raw transaction. Available on ethereum, binance, avalanche, polygon, cronos, arbitrum, fantom, optimism, solana, stellar and near.
getapprovaldata	Read	Retrieves approval-related information for a specified address, including token details, amount approved, spender, risk factor, value at risk, and timestamp. This is currently available for EVM chains

Every chain requires a different set of parameters to perform the common operations. Please refer to the sub-sections for details.

To perform sendtransaction() successfully, the user needs to sign the transaction first.

For more details, click here.

If the user wants to pass the RPC manually, the user can either use their own RPC or use our provided RPC, by using /getpublicrpc endpoint.

/getpublicrpc

Get the RPC of required chain.

GET https://api.expand.network/chain/getpublicrpc

Query Parameters

Name	Type	Description
chainId*	String	Refer to the Chain ID page for details.

Sample Request

https://api.expand.network/chain/getpublicrpc?chainId=1000

Sample Response

{
    "status": 200,
    "msg": "success",
    "data": {
        "rpc": "https://api.trongrid.io"
    }
}

/getapprovaldata

Retrieves approval-related information for a specified address, including token details, amount approved, spender, risk factor, value at risk, and timestamp. This is currently available for EVM chains

GET https://api.expand.network/chain/getapprovaldata

Query Parameter

Name	Type	Description
address*	String	The public address of the user.
chainId	String	Refer to the Chain ID page for details.
chainSymbol	String	Refer to the Chain ID page for details.
rpc	String	Remote procedural call URL.

Sample Request

https://api.expand.network/chain/getapprovaldata?address=0xDdE53141420C90550e87dF0349D79B3a6161f6F6

Sample Response

{
    "status": 200,
    "msg": "success",
    "data": [
        {
            "tokenAddress": "0xa35b1b31ce002fbf2058d22f30f95d405200a15b",
            "tokenSymbol": "ETHx",
            "spender": "0x9f0491b32dbce587c50c4c43ab303b06478193a7",
            "allowance": "10000000000000000000000",
            "valueAtRisk": "970278320210776",
            "riskFactor": "LOW RISK",
            "lastUpdated": "1716881351"
        },
        {
            "tokenAddress": "0x6b175474e89094c44da98b954eedeac495271d0f",
            "tokenSymbol": "DAI",
            "spender": "0xcf5540fffcdc3d510b18bfca6d2b9987b0772559",
            "allowance": "9000000000000000000",
            "valueAtRisk": "625883819604070094",
            "riskFactor": "LOW RISK",
            "lastUpdated": "1715773271"
        },
        {
            "tokenAddress": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
            "tokenSymbol": "WETH",
            "spender": "0x7a250d5630b4cf539739df2c5dacb4c659f2488d",
            "allowance": "999000000",
            "valueAtRisk": "0",
            "riskFactor": "LOW RISK",
            "lastUpdated": "1713956399"
        },
        {
            "tokenAddress": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
            "tokenSymbol": "WETH",
            "spender": "0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45",
            "allowance": "1000000000000000",
            "valueAtRisk": "0",
            "riskFactor": "LOW RISK",
            "lastUpdated": "1714459055"
        },
        {
            "tokenAddress": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
            "tokenSymbol": "WETH",
            "spender": "0xd9e1ce17f2641f24ae83637ab66a2cca9c378b9f",
            "allowance": "10000000000",
            "valueAtRisk": "0",
            "riskFactor": "LOW RISK",
            "lastUpdated": "1716373691"
        },
        {
            "tokenAddress": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
            "tokenSymbol": "WETH",
            "spender": "0xba12222222228d8ba445958a75a0704d566bf2c8",
            "allowance": "10000000",
            "valueAtRisk": "0",
            "riskFactor": "LOW RISK",
            "lastUpdated": "1716277667"
        }
    ]
}

/estimategas

Generates and returns an estimate of how much gas would be necessary to complete a transaction. This is currently available for EVM chains

POST https://api.expand.network/chain/estimategas

Request Body

Name	Type	Description
chainId	String	Refer to the Chain ID page for details.
chainSymbol	String	Refer to the Chain ID page for details.
data*	String	Encoded function call data.
from*	String	Address of the sender of the token.
to*	String	Address of the recipient of the token.
value	String	Amount being sent with the transaction.
rpc	String	Remote procedural call URL.

Sample Request

{
  "chainId": "1",
  "data": "0xb6f9de9500000000000000000000000000000000000000000000000000027504c2d159000000000000000000000000000000000000000000000000000000000000000080000000000000000000000000b999e0cb5f5e075b11239093e82703dbf0e561d60000000000000000000000000000000000000000000000000000018ef59ee21e0000000000000000000000000000000000000000000000000000000000000002000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2000000000000000000000000c3705517b4002ecd90185e07a9fcdfe8e93e9248",
  "from": "0x56Eddb7aa87536c09CCc2793473599fD21A8b17F",
  "to": "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D",
  "value": "160000000000000000"
}

Sample Response

{
    "status": 200,
    "msg": "success",
    "data": {
        "estimatedGas": "153222"
    }
}

/createfeetransaction

This endpoint lets users collect fees on transactions via the Expand API or plug-in. By default, it deducts 5 basis points from the transaction value, but the fee can be customized.

POST https://api.expand.network/chain/createfeetransaction

Request Body

Name	Type	Description
rpc	string	Remote procedural call URL.
chainId*	String	Refer to the Chain ID page for details.
chainSymbol	String	Refer to the Chain ID page for details.
from*	String	Address of the sender
to*	String	Address of the recipient
gas*	String	Maximum gas limit provided by the sender, for the transaction.
value*	String	Amount being sent with the transaction.
data	String	Encoded function call data.
gasPrice	String	The price per unit of gas

Sample Request

{
        "chainId": "1",
        "from": "0xDdE53141420C90550e87dF0349D79B3a6161f6F6",
        "to": "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
        "value": "0",
        "gas": "173376",
        "data": "0x095ea7b3000000000000000000000000dde53141420c90550e87df0349d79b3a6161f6f600000000000000000000000000000000000000000000000000038d7ea4c68000"
}

Sample Response

{
    "status": 200,
    "msg": "success",
    "data": {
        "chainId": "1",
        "from": "0xDdE53141420C90550e87dF0349D79B3a6161f6F6",
        "to": "0x558D7be6092Ca91DA26521Ac25b982D883218E2d",
        "value": "15961584451717",
        "gas": "30000",
        "nonce": 87
    }
}

Following is a sequence diagram for sendTransaction() process in chains:-

Sequence Diagram for sendTransaction