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feat(tron): add getMaxSendableAmount client request method - #555
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getMaxSendableAmount client request method
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Computes the maximum safe amount that can be sent for TRX and TRC-20 assets, with its fee quote. The sent asset and the account resources are read fresh, so the result never acts on stale balances. For native TRX sends the maximum leaves enough TRX to cover the network fees and the account activation; for TRC-20 sends the account must hold enough TRX to cover the transfer fee. When the destination is omitted, the conservative case is assumed and the quoted fees include a conservative account activation reserve. WPN-2374
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Explanation
Adds the
getMaxSendableAmountclient request method to the Tron Snap. It returns only{ amount }: the maximum amount that can be entered soonAmountInputpasses, or0when no amount can pass. Fees, balances, and validation errors are intentionally not returned.The value is derived from the same balance source (
getAccountAssetsByIDs), fee limit, and fee/reserve helpers asonAmountInput, without a brute-force search. Native TRX subtracts the network fee and, whentoAddressis omitted, the account activation reserve. TRC-20 returns the full token balance when TRX covers the transfer fee, otherwise0.References
Ticket: WPN-2374
Stacked on: #554
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