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format_units return was truncating the decimal places #675

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Dec 11, 2021
Merged

format_units return was truncating the decimal places #675

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10 changes: 9 additions & 1 deletion ethers-core/src/utils/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -79,7 +79,12 @@ pub fn format_units<T: Into<U256>, K: Into<Units>>(amount: T, units: K) -> Strin
let amount = amount.into();
let amount_decimals = amount % U256::from(10_u128.pow(units.as_num()));
let amount_integer = amount / U256::from(10_u128.pow(units.as_num()));
amount_integer.to_string() + "." + &amount_decimals.to_string()
format!(
"{}.{:0width$}",
amount_integer,
amount_decimals.as_u128(),
width = units.as_num() as usize
)
}

/// Converts the input to a U256 and converts from Ether to Wei.
Expand Down Expand Up @@ -398,6 +403,9 @@ mod tests {

let eth = format_units(U256::from_dec_str("1395633240123456789").unwrap(), "ether");
assert_eq!(eth, "1.395633240123456789");

let eth = format_units(U256::from_dec_str("1005633240123456789").unwrap(), "ether");
assert_eq!(eth, "1.005633240123456789");
}

#[test]
Expand Down