31 lines
807 B
TypeScript
31 lines
807 B
TypeScript
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const WEI_DECIMALS = 18n
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export function formatWeiAsEth(value: string, fractionDigits = 4): string {
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try {
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const normalizedDigits = Math.max(0, Math.min(18, fractionDigits))
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const wei = BigInt(value)
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const divisor = 10n ** WEI_DECIMALS
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const whole = wei / divisor
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const fraction = wei % divisor
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if (normalizedDigits === 0) {
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return `${whole.toString()} ETH`
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}
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const scale = 10n ** (WEI_DECIMALS - BigInt(normalizedDigits))
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const truncatedFraction = fraction / scale
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const paddedFraction = truncatedFraction
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.toString()
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.padStart(normalizedDigits, '0')
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.replace(/0+$/, '')
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if (!paddedFraction) {
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return `${whole.toString()} ETH`
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}
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return `${whole.toString()}.${paddedFraction} ETH`
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} catch {
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return '0 ETH'
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}
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}
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