Created function for retriving datatoken decimals.

[mariacarmina]

Fixes #262 .

Changes proposed in this PR:

• added util function for datatoken decimals retrieval
• fix amounts to convert to specified token decimals
• modified downloadTask for checkFee function which now receives chainID as parameter

Unit tests are failing due to insertLog TypeError, which is fixed by @paulo-ocean in another PR. Moved fees.test.ts inside integration, because we use contracts interaction (and requires barge & contracts).

[jamiehewitt15]

Looks good to me

[paulo-ocean]

@mariacarmina
check the test about 'feesData.v' (on comments above)
Its not correct yet. It should be:
assert( feesData.v === 27 || feesData.v === 28, 'Expected feesData.v to be 27 or 28')
tkx

[mariacarmina]

@mariacarmina check the test about 'feesData.v' (on comments above) Its not correct yet. It should be: assert( feesData.v === 27 || feesData.v === 28, 'Expected feesData.v to be 27 or 28') tkx

Fixed a lot of conflicts and now fees.test.ts file does not exist, can you point to the line of code that you are referring to in Files Changed tab? Thanks

[paulo-ocean]

@mariacarmina check the test about 'feesData.v' (on comments above) Its not correct yet. It should be: assert( feesData.v === 27 || feesData.v === 28, 'Expected feesData.v to be 27 or 28') tkx

Fixed a lot of conflicts and now fees.test.ts file does not exist, can you point to the line of code that you are referring to in Files Changed tab? Thanks

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