29 lines
456 B
Go
29 lines
456 B
Go
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package bigint
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import (
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"fmt"
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"math/big"
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"strings"
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)
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type BigInt struct {
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*big.Int
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}
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func (b BigInt) MarshalJSON() ([]byte, error) {
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return []byte("\"" + b.String() + "\""), nil
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}
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func (b *BigInt) UnmarshalJSON(p []byte) error {
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if string(p) == "null" {
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return nil
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}
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z := new(big.Int)
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_, ok := z.SetString(strings.Trim(string(p), "\""), 10)
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if !ok {
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return fmt.Errorf("not a valid big integer: %s", string(p))
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}
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b.Int = z
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return nil
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}
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