BigDecimal is a renamed BigNumber type from bignumber.js. BigDecimalish is akin to BigNumberish, but includes valid values & instances for BigDecimal.
BigNumber
bignumber.js
BigNumberish
https://mikemcl.github.io/bignumber.js/
BigDecimal is a renamed
BigNumbertype frombignumber.js. BigDecimalish is akin toBigNumberish, but includes valid values & instances for BigDecimal.