mirror of
https://github.com/hanzoai/commerce.git
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zeekay
1943f1c093
Multi-tenant commerce and billing: orders, subscriptions, invoices, plans, usage metering and a credit ledger. One Go binary. MIT OR Apache-2.0. Claude-Session: https://claude.ai/code/session_01SAtaDFm8VDiWrhYHNNtxMw
55 lines
1.9 KiB
Go
55 lines
1.9 KiB
Go
package solanapay
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import (
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"testing"
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"github.com/hanzoai/commerce/models/types/currency"
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)
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// The Solana Pay `amount` parameter is the token's own scale, not a fiat one:
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// USDC/USDT are 6-decimal SPL tokens and native SOL is 9-decimal lamports.
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// These pin that scale, and that the rendering is fixed-scale — the hand-rolled
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// version trimmed a whole amount to "1" and mis-signed anything negative.
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func TestFormatAmount(t *testing.T) {
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for _, tc := range []struct {
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name string
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cur currency.Type
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amount currency.Cents
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want string
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}{
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{"usdc whole", "usdc", 1_000_000, "1.000000"},
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{"usdc fractional", "usdc", 1_500_000, "1.500000"},
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{"usdc one minor unit", "usdc", 1, "0.000001"},
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{"usdc zero", "usdc", 0, "0.000000"},
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{"usdt whole", "usdt", 2_000_000, "2.000000"},
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{"sol whole", "sol", 1_000_000_000, "1.000000000"},
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{"sol fractional", "sol", 1_500_000_000, "1.500000000"},
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{"sol one lamport", "sol", 1, "0.000000001"},
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// A refund is negative, and the sign belongs in front of the whole
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// amount. Printing amount/scale, a dot, then amount%scale put it in the
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// middle, because Go's % keeps the sign of the dividend.
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{"usdc refund", "usdc", -1_500_000, "-1.500000"},
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{"sol refund", "sol", -1_500_000_000, "-1.500000000"},
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} {
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t.Run(tc.name, func(t *testing.T) {
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if got := formatAmount(tc.cur, tc.amount); got != tc.want {
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t.Errorf("formatAmount(%s, %d) = %q, want %q", tc.cur, tc.amount, got, tc.want)
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}
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})
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}
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}
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// An unrecognized currency is native SOL, matching mintForCurrency's default.
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func TestPayCurrencyDefaultsToSOL(t *testing.T) {
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for _, c := range []currency.Type{"sol", "", "unknown"} {
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if got := payCurrency(c).Decimals(); got != 9 {
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t.Errorf("payCurrency(%q).Decimals() = %d, want 9 (lamports)", c, got)
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}
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}
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for _, c := range []currency.Type{"usdc", "usdt"} {
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if got := payCurrency(c).Decimals(); got != 6 {
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t.Errorf("payCurrency(%q).Decimals() = %d, want 6", c, got)
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}
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}
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}
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