61 lines
1.2 KiB
Go
61 lines
1.2 KiB
Go
package bigint
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import (
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"database/sql/driver"
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"errors"
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"math/big"
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)
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// SQLBigInt type for storing uint256 in the databse.
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// FIXME(dshulyak) SQL big int is max 64 bits. Maybe store as bytes in big endian and hope
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// that lexographical sorting will work.
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type SQLBigInt big.Int
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// Scan implements interface.
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func (i *SQLBigInt) Scan(value interface{}) error {
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if value == nil {
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return nil
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}
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val, ok := value.(int64)
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if !ok {
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return errors.New("not an integer")
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}
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(*big.Int)(i).SetInt64(val)
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return nil
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}
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// Value implements interface.
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func (i *SQLBigInt) Value() (driver.Value, error) {
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val := (*big.Int)(i)
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if val == nil {
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return nil, nil
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}
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if !val.IsInt64() {
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return nil, errors.New("not an int64")
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}
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return (*big.Int)(i).Int64(), nil
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}
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// SQLBigIntBytes type for storing big.Int as BLOB in the databse.
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type SQLBigIntBytes big.Int
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func (i *SQLBigIntBytes) Scan(value interface{}) error {
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if value == nil {
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return nil
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}
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val, ok := value.([]byte)
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if !ok {
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return errors.New("not an integer")
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}
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(*big.Int)(i).SetBytes(val)
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return nil
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}
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func (i *SQLBigIntBytes) Value() (driver.Value, error) {
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val := (*big.Int)(i)
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if val == nil {
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return nil, nil
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}
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return (*big.Int)(i).Bytes(), nil
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}
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