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Binance Smart Chain

Introduction

Binance Smart Chain (BSC) is best described as a blockchain that runs in parallel to the Binance Chain. Unlike Binance Chain, BSC boasts smart contract functionality and compatibility with the Ethereum Virtual Machine (EVM). The design goal here was to leave the high throughput of Binance Chain intact while introducing smart contracts into its ecosystem.

Quick facts

Property Value
BSC Mainnet chainId 56
BSC Testnet chainId 97
BSC Blockchain Explorer https://bscscan.com/
Block time ~5 seconds

Supported endpoints

Get token balances for address
Class A
Given chain_id and wallet address, return current token balances along with their spot prices. This endpoint supports a variety of token standards like ERC20, ERC721 and ERC1155. As a special case, network native tokens like ETH on Ethereum are also returned even though it’s not a token contract.
GET /v1/:chain_id/address/:address/balances_v2/
Get transactions for address
Class A
Given chain_id and wallet address, return all transactions along with their decoded log events. This endpoint does a deep-crawl of the blockchain to retrieve all kinds of transactions that references the address including indexed topics within the event logs.
GET /v1/:chain_id/address/:address/transactions_v2/
Get ERC20 token transfers for address
Class A
Given chain_id, wallet address and contract-address, return all ERC20 token contract transfers along with their historical prices at the time of their transfer.
GET /v1/:chain_id/address/:address/transfers_v2/
Get token holders as of any block height
Class A
Given chain_id and wallet address, return a paginated list of token holders. If block-height is omitted, the latest block is used.
GET /v1/:chain_id/tokens/:address/token_holders/
Get log events by contract address
Class A
Given chain_id and contract address, return a paginated list of decoded log events emitted by a particular smart contract.
GET /v1/:chain_id/events/address/:address/
Get log events by topic hash(es)
Class A
Given chain_id and topic hash(es), return a paginated list of decoded log events with one or more topic hashes separated by a comma.
GET /v1/:chain_id/events/topics/:topic/

Go to Covalent’s API Reference

Appendix

BNB Gas token

The BNB token is the native token of the BSC network. This is similar to Ether in Ethereum. To interact with the BSC network, BNB tokens are required to pay as gas fees. The Covalent API response returns gas_* fields in fiat units.

Token mapping

Covalent maintains an on-chain real-time mapping of token addresses between Ethereum mainnet and the BSC chain. These addresses are used to reverse-lookup prices on BSC and also to return the right token logo urls.

Some example of mapped tokens:

Token Ethereum mainnet BSC mainnet
USDT 0xdac17f958d2ee523a2206206994597c13d831ec7 0x55d398326f99059ff775485246999027b3197955
BAND 0xba11d00c5f74255f56a5e366f4f77f5a186d7f55 0xad6caeb32cd2c308980a548bd0bc5aa4306c6c18

Token prices

For tokens that have a mapping back to Ethereum mainnet, Covalent is able to return the mapped prices.

Infrastructure Providers

The following provide infrastructure for this blockchain network:

Last modified: May 26, 2022: Bsp onboarding process (#206) (ca54fef)