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pezkuwichain
0eab8a8ea2
Trc20AssetBalance/RealTronGridApi.fetchTrc20Balance() read through
TronGrid's /v1/accounts/{address} REST endpoint - but a TRC-20 balance
lives entirely in the token contract's own storage, not the holder's
Account object. An address that has only ever received TRC-20 tokens
(never native TRX, never otherwise "activated" on-chain) has no Account
object at all, so /v1/accounts silently returns `data: []` for it
regardless of its real token balance, and the old code treated that the
same as a genuinely empty/zero account.
Found via a live test: a real wallet received 5 USDT-TRC20, the exchange
confirmed the transfer complete on-chain, but the app kept showing 0.
Independently verified live: /v1/accounts returned empty for the address,
while a direct balanceOf(address) contract call (triggerconstantcontract)
correctly returned 5000000.
Rewrote fetchTrc20Balance() to read via balanceOf(address) instead -
reuses the existing triggerConstantContract() call already used for TRC-20
transfer fee estimation, plus a new encodeBalanceOfParameters() ABI helper
alongside the existing transfer() one. Added a regression test pinned to
this exact real address/balance so this can't silently regress again.