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@midnight-ntwrk/midnight-js-contracts v0.1.15 • API

Midnight.js API Reference v0.1.15 / @midnight-ntwrk/midnight-js-contracts / utils / assertIsHex

Function: assertIsHex()

assertIsHex(source, byteLen?): asserts source is string

Asserts that a string represents a hex-encoded sequence of bytes.

Parameters​

• source: string

The source string.

• byteLen?: number

An optional number of bytes that source should represent. If not specified then any number of bytes can be represented by source.

Returns​

asserts source is string

Throws​

Error byteLen is <= zero. Valid hex-strings will be required to have at least one byte.

Throws​

TypeError source is not a hex-encoded string because it:

  • is empty,
  • contains invalid or incomplete characters, or
  • does not represent byteLen bytes.