fix(solana-pay): accept amount=0 in parseSolanaPayURL

[latent-9]

Problem

parseSolanaPayURL rejects a transfer request with amount=0, even though 0 is a valid amount. In parseTransferRequestURL (packages/solana-pay/src/parse-url.ts), the amount block accepts "0" via the regex and then throws on it:

if (!/^\d+(\.\d+)?$/.test(amountParam)) throw new SolanaPayParseURLError("amount invalid"); // accepts "0"
amount = parseFloat(amountParam);                                                            // 0
if (!amount) throw new SolanaPayParseURLError("amount invalid");                             // !0 is true -> throws
if (Number.isNaN(amount)) throw new SolanaPayParseURLError("amount NaN");
if (amount < 0) throw new SolanaPayParseURLError("amount negative");
// 0 is a valid `amount`

parseFloat("0") is 0, so !amount is true and the parse throws "amount invalid". This contradicts both the regex on the line above (which accepts "0") and the comment on the line below (// 0 is a valid amount). The same happens for amount=0.0.

• Input: solana:nick6zJc6HpW3kfBm4xS2dmbuVRyb5F3AnUvj5ymzR5?amount=0
• Current: throws SolanaPayParseURLError: amount invalid
• Expected: returns { recipient, amount: 0, ... }

Summary of Changes

Drop the if (!amount) guard. The regex already rejects empty and non-numeric input, and the NaN and negative checks remain, so 0 now parses while every previously-invalid input still throws. Adds a regression test (should parse a zero amount); the existing invalid-amount cases (1milliondollars, -0.1, -100) stay covered by the regex.

Fixes the rejection of amount=0 / amount=0.0.

[changeset-bot]

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Latest commit: 43c6a4c

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