git ssb

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const ethUtil = require('ethereumjs-util')
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module.exports = class Address extends Buffer {
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  constructor (value) {
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    if (value instanceof Address || value instanceof Uint8Array) {
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      super(value)
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    } else if (typeof value !== 'string') {
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      throw new Error('Invalid input to address')
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    } else if (!ethUtil.isHexPrefixed(value)) {
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      throw new Error('Invalid address format')
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    } else {
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      super(ethUtil.stripHexPrefix(value), 'hex')
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    }
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    if (this.length !== 20) {
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      throw new Error('Invalid address length')
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    }
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  }
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  toString () {
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    return '0x' + this.toString('hex')
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  }
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  isZero () {
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    return this.every((el) => el === 0)
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  }
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  equals (address) {
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    return this.toString('hex') === address.toBuffer().toString('hex')
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  }
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}
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