Asset IDs | walletstech | Documentation

This page is generated from the service’s chain configuration. It is always in step with what the API actually accepts.

Every endpoint except /auth, /create and /addresses takes an assetId — the integer that selects which chain and which asset you are operating on. It resolves to a chain, a chain manager, and your wallet on that chain.

Send it as an integer (21) or an all-digit string ("21"); both normalise to the same value. A missing assetId returns 400 assetId is required, and an unrecognised one returns 400 Unknown assetId.

Supported assets

assetId	Chain	Symbol	Kind	Decimals
`1`	BITCOIN	BTC	native	8
`2`	ETHEREUM	ETH	native	18
`21`	ETHEREUM	USDT	ERC20	6
`22`	ETHEREUM	USDC	ERC20	6
`3`	BNB	BNB	native	18
`31`	BNB	USDT	BEP20	18
`32`	BNB	USDC	BEP20	18
`4`	TRON	TRX	native	6
`41`	TRON	USDT	TRC20	6
`42`	TRON	USDC	TRC20	6
`5`	POLYGON	POL	native	18
`51`	POLYGON	USDT	ERC20	6 — mainnet only
`52`	POLYGON	USDC	ERC20	6
`6`	SOLANA	SOL	native	9
`61`	SOLANA	USDT	SPL	6 — mainnet only
`62`	SOLANA	USDC	SPL	6

Chains

Chain	Family	Native asset
BITCOIN	UTXO	BTC
ETHEREUM	EVM	ETH
BNB	EVM	BNB
TRON	TVM	TRX
POLYGON	EVM	POL
SOLANA	SVM	SOL

A chain is only live if the deployment you are calling is configured for it. If an address is missing from /addresses, that chain was not configured when the user was created — backfill it with /extend.

Network-dependent assets

51 (POLYGON USDT) and 61 (SOLANA USDT) have no testnet contract address. On a testnet deployment those assetIds do not exist, and requests for them return 400 Unknown assetId.

Decimals

You never send base units. Amounts are always human-decimal strings — "25.5", not 25500000. The service converts to base units using the decimals above.

Watch the one asymmetry: USDT and USDC use 18 decimals on BNB Chain and 6 decimals everywhere else. The service handles the conversion, so this only matters if you are also reading balances straight off-chain.