Add info about basic general blockchain components to indexer

[bogdanS98]

Closes #31

[ebma]

Any idea why some blocks will return more calls than extrinsic count? I thought each call was associated with one extrinsic.

I guess batching is a good explanation to this. If you batch two extrinsics (or rather 'calls') into the utility.batch or utility.batchAll extrinsic, then you have two calls but one extrinsic. For example, here I batched two calls to system.remark but as you can see on the side, it's contained in just one extrinsic.

[gianfra-t]

Any idea why some blocks will return more calls than extrinsic count? I thought each call was associated with one extrinsic.

I guess batching is a good explanation to this. If you batch two extrinsics (or rather 'calls') into the utility.batch or utility.batchAll extrinsic, then you have two calls but one extrinsic. For example, here I batched two calls to system.remark but as you can see on the side, it's contained in just one extrinsic.

Ohh I see now, thanks for the explanation.